A comparative study of the hard clam gonad developmental cycle.
TLDR
It is shown that hard clam reproductive cycles in Delaware Bay are in phase and that spawning activity during 1971-1973 was of sufficient intensity to provide ample larval stocks and supporting evidence that different physiological races exist in the three areas compared.Abstract:
1. This study has shown that hard clam reproductive cycles in Delaware Bay are in phase and that spawning activity during 1971-1973 was of sufficient intensity to provide ample larval stocks.2. The gonad developmental patterns for clams in Delaware are intermediate between those for Long Island and North Carolina. The data provide supporting evidence that different physiological races exist in the three areas compared. A further test on the validity of physiological races could be determined by studying the developmental patterns of Long Island and North Carolina clams held experimentally in Delaware Bay.3. Environmental factors attribute to subtle differences in reproductive physiology as evidenced by the different mechanisms of regeneration and development between Delaware Bay and Henlopen hard clam females.The authors wish to thank Dr. Melbourne R. Carriker, Dr. R. W. Menzel, Dr. L. Watling, Mr. Hugh Porter for critical review of the manuscript, and Dr. Jonathan Taylor and Ms. Ann Taylor who provided p...read more
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The Assessment of Marine Pollution - Bioassays with Bivalve Embryos and Larvae
TL;DR: Bioassays have increasingly come into use during the past three decades and are now commonly employed to ascertain the biological effects of pure chemicals, as well as to determine the quality of effluents, coastal waters and sediments sampled in the field.
Journal ArticleDOI
Factors contributing to heavy metal accumulation in sediments and in the intertidal mussel Perna perna in the Gulf of Annaba (Algeria).
Bourhane-Eddine Belabed,Xavier Laffray,Amel Dhib,Mouna Fertouna-Belakhal,Souad Turki,Lotfi Aleya +5 more
TL;DR: A seasonal survey of heavy metals accumulated in sediments and in the soft parts of the body of the mussel Perna perna at four stations in the Gulf of Annaba confirms the usefulness of P. perna as a bioindicator for heavy metal pollution.
Spawning cycle, fecundity, and recruitment in a population of soft-shell clam, mya arenaria, from cape ann, massachusetts
TL;DR: A population of Myaarenaria in the Annisquam Riversystem, Gloucester, Mass., was studied for 3 yr to determine spawning frequency, fecundity, and recruitment rates under natural conditions.
Journal ArticleDOI
Reduced performance of native infauna following recruitment to a habitat-forming invasive marine alga
Paul E. Gribben,Jeffrey T. Wright,Wayne A. O'Connor,Martina A. Doblin,Bradley D. Eyre,Peter D. Steinberg +5 more
TL;DR: The results demonstrate that recruitment of native species to habitat-forming invasive species can reduce growth, condition and survivorship and that studies conducted at the community level may lead to erroneous conclusions about the impacts of invaders and should include studies on life-history traits, particularly juveniles.
Journal ArticleDOI
Seasonal allocation of resources to growth of shell, soma, and gonads in mercenaria mercenaria
TL;DR: The best explanations for the anomalously high volumetric growth of juveniles relative to adults in December and January are: winter availability of a food source accessible only to juveniles or biochemical storage of energy during winter by adults in preparation for the process of rapid gametogenesis in spring.
References
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Book
Animal Tissue Techniques
TL;DR: Animal tissue techniques, Animal tissue techniques , مرکز فناوری اطلاعات و اصاع رسانی, کδاوρزی
Book
The American oyster: Crassostrea virginica Gmelin
TL;DR: Ostrea was given by Linnaeus (1758) to a number of mollusks which he described as follows: "Tethys, testa bivalvis inaequivalvis, subaurita. Vulva anusve nulius" as mentioned in this paper.
Journal ArticleDOI
The Rate of Growth of the Hard Clam Mercenaria mercenariaL) throughout the Geographical Range
Journal ArticleDOI
Reproduction, Growth and Mortality of Venus Striatula (Da Costa) in Kames Bay, Millport
TL;DR: Seasonal changes in the gonads of both sexes of Venus striatula were followed by macroscopic and microscopic examination, in over 700 animals from a population consisting mainly of one year-group.