Description and Comparison of Eggs and Yolk Sac Larvae of Greenland Cod (Gadus ogac), Atlantic Cod (Gadus morhua) and Arctic Cod(Boreogadus saida) from West Greenland Waters
نویسندگان
چکیده
منابع مشابه
Microhabitat Use and Vertical Habitat Partitioning of Juvenile Atlantic (Gadus morhua) and Greenland (Gadus ogac) Cod in Coastal Newfoundland
Twenty co-occurring juvenile gadids (10 Gadus ogac and 10 Gadus morhua) were surgically implanted with ultrasonic transmitters with depth sensors and continuously monitored for up to 23 days in the summers of 2009 and 2010 to test fine-scale habitat use and vertical distribution overlap in coastal Newfoundland (>18700 positional fixes). A habitat map with 8 substrate and 3 slope classes (low (<...
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Copepods as feed promote better growth and development in marine fish larvae than rotifers. However, unlike rotifers, copepods contain several minerals such as iodine (I), at potentially toxic levels. Iodine is an essential trace element and both under and over supply of I can inhibit the production of the I containing thyroid hormones. It is unknown whether marine fish larvae require copepod l...
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This paper presents a description of the embryonic development of Atlantic cod Gadus morhua. In addition, an equation describing the effect of temperature on developmental rate was developed. The whole period of embryogenesis was divided into 6 subperiods and 75 specific stages based on the distinctive characteristics. Temperature effects on the developmental rate of Atlantic cod embryos were s...
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Cannibalism in Atlantic cod Gadus morhua is widespread under both field and culture conditions, but no studies have been conducted on the behavioural ontogeny of cannibalism in this species. We carried out an experiment to investigate the onset and ontogenetic changes in cannibalistic behaviour of Atlantic cod during early developmental stages. Cod larvae were separated into 4 size classes (6, ...
متن کاملMaternal influence on the size and viability of Iceland cod Gadus morhua eggs and larvae
Size, condition, and age of female-Icelandic cod Gadus morhua were correlated to the size of their eggs and newly hatched larvae. A positive relationship was detected between egg size and some larval viability parameters, including the age at first feeding, successful development of a swimbladder, and specific growth rates during the first 15 days after hatching. These results reveal that the v...
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ژورنال
عنوان ژورنال: Journal of Northwest Atlantic Fishery Science
سال: 1994
ISSN: 0250-6408,1682-9786,1811-8224
DOI: 10.2960/j.v16.a2