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Rodney A. Rountree Joachim P. Gröger David Martins 《Marine and Freshwater Behaviour and Physiology》2013,45(1):73-78
The extensive periodic vertical movements of up to 14 h and 209 m observed in this study for an individual goosefish, Lophius americanus, challenges previous assumptions about the benthic and highly sedentary behavior of the species as well as of other lophiids. Researchers should consider conducting similar data storage tagging studies with other benthic fishes to test assumptions of sedentary behavior. 相似文献
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M. Yoneda ¶ M. Tokimura † H. Fujita ‡ N. Takeshita K. Takeshita M. Matsuyama S. Matsuura 《Journal of fish biology》1998,53(1):164-178
The reproductive cycle and sexual maturity of the anglerfish Lophiomus setigerus were examined. Spermatids were released from the germinal cysts into the lumina of the seminal lobules, and both spermatids and spermatozoa were present in the lumina of the seminal lobules and sperm ducts. Spermatogenesis and vitellogenesis occurred throughout most of the year. The testes of males were full of spermatozoa throughout the year, with spawning from May to November. Males and females reached sexual maturity at a mean total length and age of 178 mm, 3.3 years and 303 mm, 6.1 years, respectively. There were clear seasonal cycles in the gonadosomatic index (IG ) and hepatosomatic index ( I H ) in females. The mean IG of females increased rapidly with ovarian development while the mean I H decreased from the middle of vitellogenesis to final maturation. Mean values of I G and I H in males increased with testicular development. 相似文献
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C. H. Laurenson† 《Journal of fish biology》2006,68(4):1287-1290
Embryo development over a 5 day period are shown and described from a rare find of anglerfish Lophius piscatorius spawn that was obtained at the Shetland Islands, U.K. The stage of development shown is earlier than that previously available for the species. 相似文献
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《Marine and Freshwater Behaviour and Physiology》2008,41(1):73-78
The extensive periodic vertical movements of up to 14 h and 209 m observed in this study for an individual goosefish, Lophius americanus, challenges previous assumptions about the benthic and highly sedentary behavior of the species as well as of other lophiids. Researchers should consider conducting similar data storage tagging studies with other benthic fishes to test assumptions of sedentary behavior. 相似文献
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The chorion surface ultrastructure of unfertilized eggs of black anglerfish Lophius budegassa and white anglerfish Lophius piscatorius was examined by scanning electron microscopy. Species‐specific differences were observed. 相似文献
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M. Yoneda § M. Tokimura † H. Fujita † N. Takeshita ‡ K. Takeshita ‡ M. Matsuyama S. Matsuura 《Journal of fish biology》1998,52(1):94-106
The ovarian structure and batch fecundity of anglerfish Lophiomus setigerus were examined from specimens collected in the East China Sea during March 1991 to September 1995. The right and left ovarian lobes were connected at their posterior ends. Stalk-like ovigerous lamellae protruded from the ovarian wall. During the spawning season, gelatinous material was secreted from the epithelia of both the ovigerous lamellae and ovarian wall, and these epithelia showed morphological changes accompanying the ovarian maturation cycle. Tertiary yolk, migratory nucleus, and mature stage oocytes occurred in the ovaries between May and November, when females with postovulatory follicles and developing vitellogenic oocytes were collected also. These results suggested an extended spawning season during which females undergo repeated spawnings. When the most advanced oocytes attained the secondary yolk stage, they formed a batch that separated from the adjacent group of smaller oocytes. Batch fecundity ( F ) in 20 females with secondary yolk stage ovaries was related to total length (LT , mm) as F= 556.2 LT 1.157 (300≤LT ≤396). 相似文献
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G. BLANCO Y. J. BORRELL E. CAGIGAS E. VZQUEZ J. A. SNCHEZ PRADO 《Molecular ecology resources》2006,6(3):767-769
A microsatellite‐enriched genomic library was obtained using individuals of the black anglerfish (Lophius budegassa) and eight polymorphic microsatellites were successfully optimized. The genetic analysis of 50 black anglerfish individuals captured in the Cantabrian coasts revealed high polymorphism with a mean of number of alleles per locus of Na = 10.5 (5–28 alleles) and a mean expected heterozygosity of 0.740 (0.521–0.962). This microsatellite set was also functional with a sample from the white anglerfish (Lophius piscatorious) showing a high polymorphism. 相似文献
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