Vermont`s Wildlife Action Plan
... Only two sub-populations of Northern Brook Lamprey are known to occur in Vermont, i.e. the Malletts CreekIndian Brook watershed (Langdon 2014). On a range-wide scale no major threats are known, but the species is vulnerable to local extirpation through indiscriminant use of fish toxicants (COSEWIC 2 ...
... Only two sub-populations of Northern Brook Lamprey are known to occur in Vermont, i.e. the Malletts CreekIndian Brook watershed (Langdon 2014). On a range-wide scale no major threats are known, but the species is vulnerable to local extirpation through indiscriminant use of fish toxicants (COSEWIC 2 ...
Response of native and introduced fishes to presumed antipredator
... (Wheeler et al., 2003). This decline in recruitment could indicate reproductive failure, high egg mortality, or low survivorship of larvae. Because of this decline, both the eastern hellbender (C. a. alleganiensis) and Ozark hellbender (C. a. bishopi) are listed as state endangered in Missouri (MDC, ...
... (Wheeler et al., 2003). This decline in recruitment could indicate reproductive failure, high egg mortality, or low survivorship of larvae. Because of this decline, both the eastern hellbender (C. a. alleganiensis) and Ozark hellbender (C. a. bishopi) are listed as state endangered in Missouri (MDC, ...
LIFE HISTORY VARIATION AND DIET OF THE ENDANGERED
... The fitness consequences of low genetic diversity in wild animal populations are of great concern to species conservation. The endangered tidewater goby, Eucyclogobius newberryi, occurs in reproductively isolated populations along the California coast that exhibit tremendous variation in genetic div ...
... The fitness consequences of low genetic diversity in wild animal populations are of great concern to species conservation. The endangered tidewater goby, Eucyclogobius newberryi, occurs in reproductively isolated populations along the California coast that exhibit tremendous variation in genetic div ...
click here for pdf. - The Rewilding Institute
... the pack, usually consisting of 2-8 closely related wolves with strong bonds of attachment that travel, hunt, feed, and rest together in a loose association (Mech 1970; Nowak 1991; Wayne et al. 1995). The “alpha” or breeding pair are usually unrelated (Smith et al. 1997). Breeding usually occurs onl ...
... the pack, usually consisting of 2-8 closely related wolves with strong bonds of attachment that travel, hunt, feed, and rest together in a loose association (Mech 1970; Nowak 1991; Wayne et al. 1995). The “alpha” or breeding pair are usually unrelated (Smith et al. 1997). Breeding usually occurs onl ...
Coqui frog invasions change invertebrate communities in Hawaii
... et al. 2003), and even increasing native species (Barber et al. 2008; Cohen and Carlton 1998; Roemer et al. 2002). However, community-level changes induced by some non-natives can be difficult to observe, especially if the changes occur to communities that have high spatial and temporal variability, ...
... et al. 2003), and even increasing native species (Barber et al. 2008; Cohen and Carlton 1998; Roemer et al. 2002). However, community-level changes induced by some non-natives can be difficult to observe, especially if the changes occur to communities that have high spatial and temporal variability, ...
California Red-Legged Frog (Rana aurora draytonii)
... strong statistical correlation between locations where frog numbers had declined and upwind agricultural land use. They concluded that wind-borne agrochemicals might be an important factor in these declines. Poorly managed recreation, mining, timber harvest, and infrastructure maintenance activities ...
... strong statistical correlation between locations where frog numbers had declined and upwind agricultural land use. They concluded that wind-borne agrochemicals might be an important factor in these declines. Poorly managed recreation, mining, timber harvest, and infrastructure maintenance activities ...
Sage-Grouse and Indirect Interactions: Potential Implications of
... of conservation concern, where relatively little in coyotes also allowed jackrabbits(Lepusspp.) mention is made of the potential consequences to increase, then Greater Sage-Grouse could of indirect interactions. However, given the suffer from apparentcompetition (i.e., negative increasingly recogniz ...
... of conservation concern, where relatively little in coyotes also allowed jackrabbits(Lepusspp.) mention is made of the potential consequences to increase, then Greater Sage-Grouse could of indirect interactions. However, given the suffer from apparentcompetition (i.e., negative increasingly recogniz ...
Importance of the Allee effect for reintroductions1
... In many species, individuals benefit from the presence of conspecifics. The level at which intraspecific competition exceeds the benefits of conspecific presence varies much between species. There is a growing realization that this level can be relatively high in many species. In fact, in some cases ...
... In many species, individuals benefit from the presence of conspecifics. The level at which intraspecific competition exceeds the benefits of conspecific presence varies much between species. There is a growing realization that this level can be relatively high in many species. In fact, in some cases ...
Small mouthed Salamander (Ambystoma texanum)
... The federal, provincial, and territorial government signatories under the Accord for the Protection of Species at Risk (1996) 2 agreed to establish complementary legislation and programs that provide for effective protection of species at risk throughout Canada. Under the Species at Risk Act (S.C. 2 ...
... The federal, provincial, and territorial government signatories under the Accord for the Protection of Species at Risk (1996) 2 agreed to establish complementary legislation and programs that provide for effective protection of species at risk throughout Canada. Under the Species at Risk Act (S.C. 2 ...
Limiting Factors in Caribou Population Ecology
... wild Rangifer populations worldwide discloses that factors that have regulated those populations are highly variable between populations, apparently as a reflection of the differences in environmental variables unique to each population. Examples exist of populations where major regulating factors h ...
... wild Rangifer populations worldwide discloses that factors that have regulated those populations are highly variable between populations, apparently as a reflection of the differences in environmental variables unique to each population. Examples exist of populations where major regulating factors h ...
bullfrogs - Endangered Wildlife Trust
... Some male bullfrogs bury themselves in the dry bed of their breeding sites. However most members of bullfrog populations bury themselves several hun¬dred meters away from their breeding sites. (Most male bullfrog study animals at a breeding site in Diepsloot, Gauteng, bur¬ied themselves within a 20 ...
... Some male bullfrogs bury themselves in the dry bed of their breeding sites. However most members of bullfrog populations bury themselves several hun¬dred meters away from their breeding sites. (Most male bullfrog study animals at a breeding site in Diepsloot, Gauteng, bur¬ied themselves within a 20 ...
Habitats of frogs and toads that consists of the combination of a
... sense of the seasons and the nature experience in the childhood by hearing chorus of frogs in early summer and capturing tadpoles in spring, etc. On the other hand, since frogs and toads are amphibians, both water and terrestrial habitats are necessary in their life history, excluding completely aqu ...
... sense of the seasons and the nature experience in the childhood by hearing chorus of frogs in early summer and capturing tadpoles in spring, etc. On the other hand, since frogs and toads are amphibians, both water and terrestrial habitats are necessary in their life history, excluding completely aqu ...
Ecological Effects of Pesticides
... At a community level, ecology can be defined as complex interactions that exist among interdependent organisms that cohabitate the same geographical area and with their environment (Johnson and Strinchcombe, 2007). At individual level, it entails the relationships that exist between that particular ...
... At a community level, ecology can be defined as complex interactions that exist among interdependent organisms that cohabitate the same geographical area and with their environment (Johnson and Strinchcombe, 2007). At individual level, it entails the relationships that exist between that particular ...
desert bighorn sheep of new mexico
... workshop facilitator, and Amy Fisher, Assistant Chief, Conservation Services Division, NMGF, who coordinated arrangements for the workshop. Dr. Eric Rominger, Bighorn Sheep Contractor for NMGF, presented a background report that summarized the history and current status of desert bighorn in the stat ...
... workshop facilitator, and Amy Fisher, Assistant Chief, Conservation Services Division, NMGF, who coordinated arrangements for the workshop. Dr. Eric Rominger, Bighorn Sheep Contractor for NMGF, presented a background report that summarized the history and current status of desert bighorn in the stat ...
How fast do migratory songbirds have to adapt to keep pace with
... by human land use. Given the rate such changes are occurring, it is unclear how quickly species might need to adapt, whether genetically or behaviorally, especially in migratory songbirds that have declined in recent decades as a result of habitat loss and fragmentation. Objective My objective was t ...
... by human land use. Given the rate such changes are occurring, it is unclear how quickly species might need to adapt, whether genetically or behaviorally, especially in migratory songbirds that have declined in recent decades as a result of habitat loss and fragmentation. Objective My objective was t ...
Banded Killifish (Fundulus diaphanus)
... Existing Protection or Other Status The Newfoundland populations of Banded Killifish are currently listed as a species of special concern by the Committee on the Status of Endangered Wildlife in Canada. In addition, Fundulus diaphanus is one of 20 species protected under the Newfoundland and Labrado ...
... Existing Protection or Other Status The Newfoundland populations of Banded Killifish are currently listed as a species of special concern by the Committee on the Status of Endangered Wildlife in Canada. In addition, Fundulus diaphanus is one of 20 species protected under the Newfoundland and Labrado ...
Scott, D. E. 2005. Ambystoma opacum (Marbled Salamander). p
... (i.e., the duration of the egg stage). Substantial (15–30%) variation in egg diameter occurs within and among populations (Kaplan, 1980a). Egg size is positively correlated with hatchling size and early larval size (Kaplan, 1980a). In spite of terrestrial egg laying, egg structure in marbled salaman ...
... (i.e., the duration of the egg stage). Substantial (15–30%) variation in egg diameter occurs within and among populations (Kaplan, 1980a). Egg size is positively correlated with hatchling size and early larval size (Kaplan, 1980a). In spite of terrestrial egg laying, egg structure in marbled salaman ...
The role of macrophytes in habitat structuring in aquatic
... related to the habitat structural complexity provided by these plants, exploring: i) how complexity has been viewed by ecologists, with an emphasis on macrophyte studies; ii) the pros and cons of several methods used to quantify plant complexity; iii) the consequences of habitat structuring by macro ...
... related to the habitat structural complexity provided by these plants, exploring: i) how complexity has been viewed by ecologists, with an emphasis on macrophyte studies; ii) the pros and cons of several methods used to quantify plant complexity; iii) the consequences of habitat structuring by macro ...
3 Biological Resources Limiting Factors
... impacts to aquatic habitats in terms of the degree to which altered ecosystem components impact habitat quality or quantity for focal fish species in the subbasins. The technical teams relied on existing information and professional judgment to make these assessments. Watershed level assessments of ...
... impacts to aquatic habitats in terms of the degree to which altered ecosystem components impact habitat quality or quantity for focal fish species in the subbasins. The technical teams relied on existing information and professional judgment to make these assessments. Watershed level assessments of ...
Species Accounts - Contra Costa County
... Townsend’s big-eared bats can be found in a variety of habitats throughout California, but they are most commonly associated with desert scrub, mixed conifer forest, and pinon-juniper or pine forest habitat. Within these communities, they are specifically associated with limestone caves, mines, lava ...
... Townsend’s big-eared bats can be found in a variety of habitats throughout California, but they are most commonly associated with desert scrub, mixed conifer forest, and pinon-juniper or pine forest habitat. Within these communities, they are specifically associated with limestone caves, mines, lava ...
Lesser Prairie-Chicken Conservation Initiative Lesser Prairie
... Table 7.1. Number of participants who hunted or wildlife watched within the 5states involved in the LPCIWG, 2001 ...............................................................................78 ...
... Table 7.1. Number of participants who hunted or wildlife watched within the 5states involved in the LPCIWG, 2001 ...............................................................................78 ...
Ballarat West Growth Area
... construction of housing, associated infrastructure and recreational opportunities. As such, the Project triggers a number of known threatening processes affecting this species, principally habitat loss via the removal of known GGF habitat to consolidate the Project’s layout. Thus, without mitigation ...
... construction of housing, associated infrastructure and recreational opportunities. As such, the Project triggers a number of known threatening processes affecting this species, principally habitat loss via the removal of known GGF habitat to consolidate the Project’s layout. Thus, without mitigation ...
SOUTHERN BROWN BANDICOOT – ISOODON OBESULUS
... A range of threats to SBB have been identified however the degree posed by each threat to SBB survival and the relationship between concurrent threats is not definitive. Some populations have managed to survive despite the threats and it is difficult to determine why this might be. Long term studies ...
... A range of threats to SBB have been identified however the degree posed by each threat to SBB survival and the relationship between concurrent threats is not definitive. Some populations have managed to survive despite the threats and it is difficult to determine why this might be. Long term studies ...
Diet of coastal foraging Eurasian otters ( L.) in Pembrokeshire
... means that there is also a risk of crude oil spillage, whilst the Pembrokeshire coast has also been identified as a potential site for renewable energy development (Project Management Support Services 2006). Thus, the extent to which otters use marine habitats in Pembrokeshire needs to be determined ...
... means that there is also a risk of crude oil spillage, whilst the Pembrokeshire coast has also been identified as a potential site for renewable energy development (Project Management Support Services 2006). Thus, the extent to which otters use marine habitats in Pembrokeshire needs to be determined ...
Red Knot (Calidris canutus) - Registre public des espèces en péril
... 2000, but have since declined dramatically. Few knots now remain at “peripheral” sites along the coast of Patagonia, which held significant numbers in the 1980s. Similar declines have been observed throughout the migration range of rufa, confirming an actual population decline rather than a redistri ...
... 2000, but have since declined dramatically. Few knots now remain at “peripheral” sites along the coast of Patagonia, which held significant numbers in the 1980s. Similar declines have been observed throughout the migration range of rufa, confirming an actual population decline rather than a redistri ...
Decline in amphibian populations
Since the 1980s, declines in amphibian populations, including population crashes and mass localized extinctions, have been noted from locations all over the world. These declines are perceived as one of the most critical threats to global biodiversity, and several causes are believed to be involved, including disease, habitat destruction and modification, exploitation, pollution, pesticide use, introduced species, and ultraviolet-B radiation (UV-B). However, many of the causes of amphibian declines are still poorly understood, and the topic is currently a subject of much ongoing research. Calculations based on extinction rates suggest that the current extinction rate of amphibians could be 211 times greater than the background extinction rate and the estimate goes up to 25,000–45,000 times if endangered species are also included in the computation.