Distribution and Habitat Associations of Spotted Ratfish (Hydrolagus
... precise locations of 149 individuals were plotted across four major study areas, including northern Monterey Bay, Point Lobos, Point Sur, and La Cruz Canyon. A habitat selectivity index was calculated to determine positive and negative associations with available habitat types. Spotted ratfish were ...
... precise locations of 149 individuals were plotted across four major study areas, including northern Monterey Bay, Point Lobos, Point Sur, and La Cruz Canyon. A habitat selectivity index was calculated to determine positive and negative associations with available habitat types. Spotted ratfish were ...
Trophic Interactions during Primary Succession
... al. 1997). These observations indicate that edge sites represent typical lupine habitat and that site quality alone is unlikely to explain the recent decrease in lupine growth rates. A potential cause of reduced spatial spread (but not locally reduced population growth) is dispersal limitation (i.e. ...
... al. 1997). These observations indicate that edge sites represent typical lupine habitat and that site quality alone is unlikely to explain the recent decrease in lupine growth rates. A potential cause of reduced spatial spread (but not locally reduced population growth) is dispersal limitation (i.e. ...
012
... combined and several species are represented by less than 6 PUs. As mentioned previously, two management designations are defined to stabilize species: manage for in situ stability and collect for captive propagation. Ten Achatinella species were included within the Service’s 2003 Biological Opinion ...
... combined and several species are represented by less than 6 PUs. As mentioned previously, two management designations are defined to stabilize species: manage for in situ stability and collect for captive propagation. Ten Achatinella species were included within the Service’s 2003 Biological Opinion ...
Behavioural ecology of the black-flanked rock
... understanding of the ecology of P. l. lateralis was that there was little information on their behavioural, foraging and feeding patterns, and how these affect the population dynamics of the species. Although this species appears to be substrate bound, requiring complex rock structures that are beli ...
... understanding of the ecology of P. l. lateralis was that there was little information on their behavioural, foraging and feeding patterns, and how these affect the population dynamics of the species. Although this species appears to be substrate bound, requiring complex rock structures that are beli ...
The dynamical theory of coevolution
... but obtains until then to keep notation reasonably simple. The development of the coevolutionary community is caused by the process of mutation, introducing new mutant trait values s , and the process of G selection, determining survival or extinction of these mutants. A formal description will be ...
... but obtains until then to keep notation reasonably simple. The development of the coevolutionary community is caused by the process of mutation, introducing new mutant trait values s , and the process of G selection, determining survival or extinction of these mutants. A formal description will be ...
LOCAL DISTURBANCE CYCLES AND THE MAINTENANCE OF
... recolonization has been shown to explain species composition and distribution (Wootton 2001a), and the effects of habitat fragmentation on the structure of competitive communities (Roy et al. 2004). It has further been shown to generate landscape-level patchiness and disturbance cycles in model syst ...
... recolonization has been shown to explain species composition and distribution (Wootton 2001a), and the effects of habitat fragmentation on the structure of competitive communities (Roy et al. 2004). It has further been shown to generate landscape-level patchiness and disturbance cycles in model syst ...
California Red-Legged Frog (Rana draytonii) Movement and Habitat
... ponds all year, but 66% of female and 25% of male frogs moved to nonbreeding areas, even when the breeding site retainedwater.Frogsat our main study site moved 150 m (median),roughly the distance to the nearest suitable nonbreeding area. The greatest straight-line distance traveled was 1.4 km, altho ...
... ponds all year, but 66% of female and 25% of male frogs moved to nonbreeding areas, even when the breeding site retainedwater.Frogsat our main study site moved 150 m (median),roughly the distance to the nearest suitable nonbreeding area. The greatest straight-line distance traveled was 1.4 km, altho ...
From arctic lemmings to adaptive dynamics
... climatic variation. To support this conclusion, he examined long-term population data then available. Despite his firm belief in a climatic cause of the self-repeating periodic dynamics which many species display, Elton was insightful and far-sighted enough to outline many of the other hypotheses si ...
... climatic variation. To support this conclusion, he examined long-term population data then available. Despite his firm belief in a climatic cause of the self-repeating periodic dynamics which many species display, Elton was insightful and far-sighted enough to outline many of the other hypotheses si ...
Red Knot (Calidris canutus) - Registre public des espèces en péril
... A species, subspecies, variety, or geographically or genetically distinct population of animal, plant or other organism, other than a bacterium or virus, that is wild by nature and is either native to Canada or has extended its range into Canada without human intervention and has been present in Can ...
... A species, subspecies, variety, or geographically or genetically distinct population of animal, plant or other organism, other than a bacterium or virus, that is wild by nature and is either native to Canada or has extended its range into Canada without human intervention and has been present in Can ...
“Missouri Invasions” draft 11Nov00
... reservoirs in Missouri (Havel et al. 1995). Surveys of 43 reservoirs during 1980-86 found no populations (W.R. Mabee, Missouri Department of Conservation, pers. com.). The second assumption was that lakes where D. lumholtzi was recorded in one year were considered invaded in all subsequent years, an ...
... reservoirs in Missouri (Havel et al. 1995). Surveys of 43 reservoirs during 1980-86 found no populations (W.R. Mabee, Missouri Department of Conservation, pers. com.). The second assumption was that lakes where D. lumholtzi was recorded in one year were considered invaded in all subsequent years, an ...
aggregation
... 2) mortality risk during patch location may be higher than that on patch 3) per capita predation risk low on densly occupied patches 4) oviposition “window“ is too short (Shorrocks & Bingley 1990) 5) patchy enviroments are information poor and provide no learnable information – particularly not to s ...
... 2) mortality risk during patch location may be higher than that on patch 3) per capita predation risk low on densly occupied patches 4) oviposition “window“ is too short (Shorrocks & Bingley 1990) 5) patchy enviroments are information poor and provide no learnable information – particularly not to s ...
Evolution of Delayed Reproduction in Uncertain
... developmental delay (e.g., growth and behavioral acquisition) can also lead to delayed reproduction (Stearns 1992). In a seminal article, Cole (1954) proposed that delayed reproduction has a more influential effect on fitness than other demographic traits, thus spurring interest in the study of its ...
... developmental delay (e.g., growth and behavioral acquisition) can also lead to delayed reproduction (Stearns 1992). In a seminal article, Cole (1954) proposed that delayed reproduction has a more influential effect on fitness than other demographic traits, thus spurring interest in the study of its ...
Roskilde University 1 - Roskilde University Digital Archive
... partly be explained by an unusually chilly spring and the fact that these two species reach their maximum activity later in season that C. nemoralis as a result of their reproductive strategy. Besides the data we acquired, we had access to diversity and abundance data describing the 2004 and 2005 se ...
... partly be explained by an unusually chilly spring and the fact that these two species reach their maximum activity later in season that C. nemoralis as a result of their reproductive strategy. Besides the data we acquired, we had access to diversity and abundance data describing the 2004 and 2005 se ...
REPORT TO THE FISH AND GAME COMMISSION: STATUS REVIEW OF THE
... the following breeding season. Adult females can breed again shortly after birth of a litter. They have about three to four litters during the season, with an average of nine to 16 young produced' per female per year. Five out of six rabbits (Sylvilagus sp.) do not survive until the next breeding s ...
... the following breeding season. Adult females can breed again shortly after birth of a litter. They have about three to four litters during the season, with an average of nine to 16 young produced' per female per year. Five out of six rabbits (Sylvilagus sp.) do not survive until the next breeding s ...
Banded Killifish (Fundulus diaphanus)
... substrate. This type of habitat is abundant throughout most watersheds in Newfoundland but the species is only found in a few of these watersheds. In addition, in watersheds where Banded Killifish occur and where there are many lakes with appropriate habitat areas, Fundulus diaphanus is often found ...
... substrate. This type of habitat is abundant throughout most watersheds in Newfoundland but the species is only found in a few of these watersheds. In addition, in watersheds where Banded Killifish occur and where there are many lakes with appropriate habitat areas, Fundulus diaphanus is often found ...
Influence of phenotypic and social traits on dispersal in a family
... (Thamnophilus atrinucha), in a lowland tropical forest. Unique to many dispersal studies, antshrikes were studied in a saturated environment, where breeding vacancies are rare, juvenile survival is high, and delayed reproduction is common (Robinson et al. 2000; Tarwater et al. 2011). Furthermore, ...
... (Thamnophilus atrinucha), in a lowland tropical forest. Unique to many dispersal studies, antshrikes were studied in a saturated environment, where breeding vacancies are rare, juvenile survival is high, and delayed reproduction is common (Robinson et al. 2000; Tarwater et al. 2011). Furthermore, ...
Everglades Snail Kite - Wildlife Ecology and Conservation
... Photo credits: Photos courtesy of Dr. Wiley Kitchens ...
... Photo credits: Photos courtesy of Dr. Wiley Kitchens ...
white rock wind farm pty limited
... circumstances and factors threatening its survival or evolutionary developments cease to operate; or, its numbers have been reduced to such a critical level, or its habitats have been so drastically reduced, that it is in immediate danger of extinction; or, it might already be extinct, but it is not ...
... circumstances and factors threatening its survival or evolutionary developments cease to operate; or, its numbers have been reduced to such a critical level, or its habitats have been so drastically reduced, that it is in immediate danger of extinction; or, it might already be extinct, but it is not ...
A snapshot of the Lesser Kestrel
... that can cause irreversible damages on the population. Therefore, it’s crucial to ensure the presence of several areas with suitable habitat for the conservation of this species. At least 20% of the Lesser Kestrel national population occurs in non-protected areas, though they’re considered as Import ...
... that can cause irreversible damages on the population. Therefore, it’s crucial to ensure the presence of several areas with suitable habitat for the conservation of this species. At least 20% of the Lesser Kestrel national population occurs in non-protected areas, though they’re considered as Import ...
COSEWIC assessment and status report on the Marbled Murrelet
... Threats and Limiting Factors Loss of nesting habitat in old-growth forests due to forest harvesting remains the greatest threat to the Marbled Murrelet. Fragmentation of the remaining forest is likely to result in increased exposure to nest predators, which prefer forest edges and changes to microc ...
... Threats and Limiting Factors Loss of nesting habitat in old-growth forests due to forest harvesting remains the greatest threat to the Marbled Murrelet. Fragmentation of the remaining forest is likely to result in increased exposure to nest predators, which prefer forest edges and changes to microc ...
Effects of low flow on dwarf galaxias and their habitat in the Wairau
... fly larvae and Deleatidium mayfly nymphs) (McDowall 2000). However, terrestrial prey recorded in stomach contents suggests that the fish feed from the drift as well as the benthos (Hopkins 1971). Hopkins (1971) recorded a dietary shift from mainly chironomids eaten by small juveniles, to mainly Dele ...
... fly larvae and Deleatidium mayfly nymphs) (McDowall 2000). However, terrestrial prey recorded in stomach contents suggests that the fish feed from the drift as well as the benthos (Hopkins 1971). Hopkins (1971) recorded a dietary shift from mainly chironomids eaten by small juveniles, to mainly Dele ...
High intraspecific variability in the functional niche of a predator is
... et al. 2011). Accordingly, low levels of intraspecific variation have been reported in the literature (Garnier et al. 2001; Dumay et al. 2004; Buckley et al. 2010). However, because intraspecific variations in functional traits can affect ecological interactions (Bolnick et al. 2011) and ecosystem f ...
... et al. 2011). Accordingly, low levels of intraspecific variation have been reported in the literature (Garnier et al. 2001; Dumay et al. 2004; Buckley et al. 2010). However, because intraspecific variations in functional traits can affect ecological interactions (Bolnick et al. 2011) and ecosystem f ...
Vermont`s Wildlife Action Plan
... trends based on QAS (raw data provided by Allaire 2015) indicate declining populations in the Winooski and Poultney rivers; and no discernible trends (decreasing or increasing) in the other streams where multiple treatments have been conducted. However, needs to be pointed out that QAS estimates typ ...
... trends based on QAS (raw data provided by Allaire 2015) indicate declining populations in the Winooski and Poultney rivers; and no discernible trends (decreasing or increasing) in the other streams where multiple treatments have been conducted. However, needs to be pointed out that QAS estimates typ ...
Informing genetic management of small populations of threatened
... development of AlleleRetain, the model that underlies a large part of my thesis, and prompted me to begin exploring the concepts of genetic conservation that are integral to my research as a whole. Development of AlleleRetain was greatly facilitated by Murray Efford (University of Otago), who kindly ...
... development of AlleleRetain, the model that underlies a large part of my thesis, and prompted me to begin exploring the concepts of genetic conservation that are integral to my research as a whole. Development of AlleleRetain was greatly facilitated by Murray Efford (University of Otago), who kindly ...
Species Accounts - Contra Costa County
... within its known range in California includes 22 data records from 1975 to 1999. Of these records, none of the 7 documented within the past 10 years were of sufficient precision to be accurately located within the survey areas. Three of these 7 records are located within the ECCC HCP/NCCP inventory ...
... within its known range in California includes 22 data records from 1975 to 1999. Of these records, none of the 7 documented within the past 10 years were of sufficient precision to be accurately located within the survey areas. Three of these 7 records are located within the ECCC HCP/NCCP inventory ...