Natural mortality of marine pelagic fish eggs and larvae: role of
... Some universal assumption had to be made because the proximate compositions of many aquatic organisms are not available in the literature. The same assumption was used by Peterson & Wroblewslu (1984) and others. Wet weight was calculated from the midpoint of the length range that spanned the time pe ...
... Some universal assumption had to be made because the proximate compositions of many aquatic organisms are not available in the literature. The same assumption was used by Peterson & Wroblewslu (1984) and others. Wet weight was calculated from the midpoint of the length range that spanned the time pe ...
Towards more efficient longline fisheries: fish feeding behaviour
... sometimes, as in scaleless catfish, all over the body surface. Chemical information detected by these specialized epithelial cells is transmitted to the central nervous system by the cranial nerves VII (facial), IX (glossopharyngeal), and X (vagal). As both olfactory and gustatory senses are mediate ...
... sometimes, as in scaleless catfish, all over the body surface. Chemical information detected by these specialized epithelial cells is transmitted to the central nervous system by the cranial nerves VII (facial), IX (glossopharyngeal), and X (vagal). As both olfactory and gustatory senses are mediate ...
Johnson and Thieltges 2010
... reduced the success of Schistosoma miracidia by 25–99%. This resulted both from parasites penetrating unsuitable hosts (an example of encounter reduction) and from parasite exhaustion or physical damage during interactions with non-hosts, such that parasites were less successful when attempting to i ...
... reduced the success of Schistosoma miracidia by 25–99%. This resulted both from parasites penetrating unsuitable hosts (an example of encounter reduction) and from parasite exhaustion or physical damage during interactions with non-hosts, such that parasites were less successful when attempting to i ...
The Importance of Fish to Bald Eagles in Southeast Alaska: A Review
... carrying capacity for eagles may depend on these salmon (Hansen et al. 1984). The large size of chum salmon (4.5-6.0 kg) and their habit of spawning late (September to November) in several Southeast Alaska rivers, including the Chilkat, make this species especially important to Bald Eagles (Morrow 1 ...
... carrying capacity for eagles may depend on these salmon (Hansen et al. 1984). The large size of chum salmon (4.5-6.0 kg) and their habit of spawning late (September to November) in several Southeast Alaska rivers, including the Chilkat, make this species especially important to Bald Eagles (Morrow 1 ...
Ecology of a sympatric pair of coregonid fish: Species interactions
... I conclude that segregation in metabolic and reproductive traits is the most likely reason for the coexistence of vendace and Fontane cisco. First, the vertical gradient in water temperature probably facilitates microhabitat segregation within the pelagic area through physiological adaptations. Furt ...
... I conclude that segregation in metabolic and reproductive traits is the most likely reason for the coexistence of vendace and Fontane cisco. First, the vertical gradient in water temperature probably facilitates microhabitat segregation within the pelagic area through physiological adaptations. Furt ...
Ecology
... pressure hosts and parasites impose on each other has caused both of their populations to evolve. ...
... pressure hosts and parasites impose on each other has caused both of their populations to evolve. ...
The Oceans and coastal areas and their resources
... Most texts on marine sciencebegin by stating that over 70% of the planet earth is covered with water. With many terrestrial resources under threat or depleted, it is tempting to view this large area of seawater as a last frontier; an area in which to extend the searchfor further resources. The list ...
... Most texts on marine sciencebegin by stating that over 70% of the planet earth is covered with water. With many terrestrial resources under threat or depleted, it is tempting to view this large area of seawater as a last frontier; an area in which to extend the searchfor further resources. The list ...
Feeding habits of yellow perch Perca flavescens and
... Hummingbird Lake; future study would sample a larger lake or several smaller lakes to better identify trends of fish diet and fish length related to DOC. The positive relationship between pelagic feeding and fish length in Crampton yellow perch was unexpected, but a very low R2 value calls into ques ...
... Hummingbird Lake; future study would sample a larger lake or several smaller lakes to better identify trends of fish diet and fish length related to DOC. The positive relationship between pelagic feeding and fish length in Crampton yellow perch was unexpected, but a very low R2 value calls into ques ...
Module 12 – Care and Use of Fish Objectives. to introduce the
... The use of fishes as experimental subjects has increased substantially over the past two decades. This increase in use is a result of the rapid development of the aquaculture industry, requirements for testing involving fishes as indicators of environmental change, and the use of fishes as a replace ...
... The use of fishes as experimental subjects has increased substantially over the past two decades. This increase in use is a result of the rapid development of the aquaculture industry, requirements for testing involving fishes as indicators of environmental change, and the use of fishes as a replace ...
Module 12 – Care and Use of Fish
... The use of fishes as experimental subjects has increased substantially over the past two decades. This increase in use is a result of the rapid development of the aquaculture industry, requirements for testing involving fishes as indicators of environmental change, and the use of fishes as a replace ...
... The use of fishes as experimental subjects has increased substantially over the past two decades. This increase in use is a result of the rapid development of the aquaculture industry, requirements for testing involving fishes as indicators of environmental change, and the use of fishes as a replace ...
PowerPoint presentation (PPT file)
... Nypa palm mangroves trees cannot growin salty water, they like freshwater ...
... Nypa palm mangroves trees cannot growin salty water, they like freshwater ...
Frontiers in Polar Biology - Division on Earth and Life Studies
... as a result of an evolutionary history in a highly stable environment. At the same time, these fish will perish at temperatures above 4º C (39º F) because they have lost from their genomes the raw materials to fabricate proteins to survive warming. Accordingly, these fish are genetically compromised ...
... as a result of an evolutionary history in a highly stable environment. At the same time, these fish will perish at temperatures above 4º C (39º F) because they have lost from their genomes the raw materials to fabricate proteins to survive warming. Accordingly, these fish are genetically compromised ...
IOSR Journal Of Environmental Science, Toxicology And Food Technology (IOSR-JESTFT)
... rivers and streams associated with biotic and abiotic macro- particles. The presence of these chemicals in the environment has become a global issue. Pesticides and related chemicals destroy the delicate balance between species and functioning ecosystem producing many physiological and biochemical c ...
... rivers and streams associated with biotic and abiotic macro- particles. The presence of these chemicals in the environment has become a global issue. Pesticides and related chemicals destroy the delicate balance between species and functioning ecosystem producing many physiological and biochemical c ...
223 kb
... recoveries from Rice Island, that through 1991, about 0.2% of all PIT tagged fish released into the Columbia River showed up on Rice Island. That percentage had increased by a factor of ten by the 1997 and 1998 juvenile salmonid out-migrations, with hatchery and wild steelhead having been the most e ...
... recoveries from Rice Island, that through 1991, about 0.2% of all PIT tagged fish released into the Columbia River showed up on Rice Island. That percentage had increased by a factor of ten by the 1997 and 1998 juvenile salmonid out-migrations, with hatchery and wild steelhead having been the most e ...
Management of Fish in Ontario - Backgroud Report Supporting
... The Ontario Shield is the largest ecozone in the province, covering about 61 per cent of Ontario. The ecozone contains the majority of ten FMZs, including: 2, 4, 5, 6, 7, 8, 10, 11, 12 and 15 (Figure 1). The aquatic habitats in the area include tens of thousands of lakes, ranging in size from small ...
... The Ontario Shield is the largest ecozone in the province, covering about 61 per cent of Ontario. The ecozone contains the majority of ten FMZs, including: 2, 4, 5, 6, 7, 8, 10, 11, 12 and 15 (Figure 1). The aquatic habitats in the area include tens of thousands of lakes, ranging in size from small ...
Myxobolus cerebralis
Myxobolus cerebralis is a myxosporean parasite of salmonids (salmon, trout, and their allies) that causes whirling disease in farmed salmon and trout and also in wild fish populations. It was first described in rainbow trout in Germany a century ago, but its range has spread and it has appeared in most of Europe (including Russia), the United States, South Africa and other countries. In the 1980s, M. cerebralis was found to require a tubificid oligochaete (a kind of segmented worm) to complete its life cycle. The parasite infects its hosts with its cells after piercing them with polar filaments ejected from nematocyst-like capsules.Whirling disease afflicts juvenile fish (fingerlings and fry) and causes skeletal deformation and neurological damage. Fish ""whirl"" forward in an awkward, corkscrew-like pattern instead of swimming normally, find feeding difficult, and are more vulnerable to predators. The mortality rate is high for fingerlings, up to 90% of infected populations, and those that do survive are deformed by the parasites residing in their cartilage and bone. They act as a reservoir for the parasite, which is released into water following the fish's death. M. cerebralis is one of the most economically important myxozoans in fish, as well as one of the most pathogenic. It was the first myxosporean whose pathology and symptoms were described scientifically. The parasite is not transmissible to humans.