Results 271 to 280 of about 89,120 (294)
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Distribution and abundance of juvenile Loligo gahi in Falkland Island waters
Marine Biology, 1994Four research surveys of Falkland Island waters were carried out to determine the distribution and abundance of the early life-history stages of Loligo gahi (d'Orbigny, 1835) in the austral winter of 1988 and the austral springs of 1990, 1991 and 1992. Juveniles were caught during three of the four surveys in both Bongo nets and an RMT8 net.
Hatfield, E. M. C., Rodhouse, P. G.
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Influence of food abundance on competitive aggression in juvenile convict cichlids
Animal Behaviour, 2002Abstract Optimality models designed to explain the occurrence of feeding territoriality predict that the frequency or intensity of aggression will peak at intermediate levels of food abundance. To test whether this prediction applies to the competition for ephemeral patches of food, we manipulated food abundance over a broad range of values in two ...
James W.A. Grant +3 more
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Abundance, biomass and production of juvenile flatfish in southeastern kattegat
Netherlands Journal of Sea Research, 1989Abstract Abundance, biomass and production of juvenile 0- and 1-group flatfish were estimated at 1.5 to 11.0 m depth from May 1984 to May 1987 in southeastern Kattegat. Species studied were: Plaice, Pleuronectes platessa (L.), sole, Solea solea (L.), dab, Limanda limanda (L.), turbot, Scophthalmus maximus (L.), brill, Scophthalmus rhombus (L.), and ...
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Patterns in abundance and growth of juvenile lobster, Homarus americanus
Marine and Freshwater Research, 2002The combined effort of assessing abundance and measuring the time between settlement and recruitment is fundamental to forecasting future recruitment to the lobster fishery. This study represents the first monthly year-round sampling for abundance and in situ growth of juvenile lobster, Homarus americanus . Juvenile lobsters for repeated mark-recapture
Diane F. Cowan +2 more
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Recruitment abundance index of Pacific bluefin tuna using fisheries data on juveniles
Fisheries Science, 2006The recruitment abundance index of Pacific bluefin tuna Thunnus orientalis was estimated from 1980 to 2003 fishing year by using the troll fishery data in Nagasaki Prefecture, western Japan. It has been shown that the troll fishery in Nagasaki Prefecture operates with good time-area coverage of the species habitat, and that the fishing power slightly ...
Harumi YAMADA +2 more
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Predictive substratum modelling for juvenile gadoid distribution and abundance
No abstracts are to be cited without prior reference to the author.Successful spatial management of species and their habitats requires a good understanding of their distribution. Coastal areas are proposed to be of particular importance for juvenile demersal fish recruitment.Elliott, Sophie. A. M. +4 more
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Estimating Riverwide Abundance of Juvenile Fish Populations: How Much Sampling is Enough?
North American Journal of Fisheries Management, 2016Abstract Estimating riverwide abundance of juvenile fish populations is challenging because detection probability is typically low and juveniles can be patchily distributed over large areas. We used a hierarchical Bayesian model to estimate the abundance of juvenile steelhead Oncorhynchus mykiss in two rivers in British Columbia over 3 ...
Korman, Josh +2 more
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Flow Regime, Juvenile Abundance, and the Assemblage Structure of Stream Fishes
Ecology, 1985The assemblage of fishes in a second—order stream in east—central Illinois was compared through seine sampling for two years with distinctly different flow regimes. In both years adult (age >0) fish were most abundant in late spring and early summer while juvenile (age 0) abundance peaked in late summer or autumn.
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Abundance and Recruitment of Juvenile Atlantic Sturgeon in the Altamaha River, Georgia
Transactions of the American Fisheries Society, 2010AbstractJuvenile Atlantic sturgeon Acipenser oxyrinchus remain in natal rivers for several years prior to out‐migrating to marine environments during later portions of their life history. Data regarding river‐resident juvenile population dynamics are unknown.
Paul Schueller, Douglas L. Peterson
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Abundance and Distribution of Juvenile Alosa Species off Southern New Jersey
Transactions of the American Fisheries Society, 1981Abstract Blueback herring (Alosa aestivalis) comprised 79%, alewife (A. pseudoharengus) 16%, and American shad (A. sapidissima) 4% of the juvenile Alosa taken in 221 bottom trawl collections made during December-April from 1972 to 1975 in coastal, southern New Jersey waters. Most of these fishes were less than 100–120 mm FL. All three species were most
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