Results 221 to 230 of about 15,886 (252)
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Marine Biology, 2008
Using previously published histological data on multiple, monthly samples of Sardina pilchardus collected in the central Aegean and Ionian Seas (September 1999–August 2000, and November 2000–February 2001), the Mediterranean sardine was treated as a case study to investigate the biological characteristics of ephemeral spawning aggregations in multiple ...
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Using previously published histological data on multiple, monthly samples of Sardina pilchardus collected in the central Aegean and Ionian Seas (September 1999–August 2000, and November 2000–February 2001), the Mediterranean sardine was treated as a case study to investigate the biological characteristics of ephemeral spawning aggregations in multiple ...
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Hormone-Induced Multiple Spawning of Captive Nassau Grouper Broodstock
The Progressive Fish-Culturist, 1996Abstract During a 5-month period from 3 December 1991 to 28 April 1992, two female Nassau grouper Epinephelus striatus were spawned three times and one female two times by hormone induction. The interval between spawnings for an individual female ranged from 28–75 d.
William D. Head +3 more
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Ab Initio Multiple Spawning Dynamics of Excited Butadiene: Role of Charge Transfer
The Journal of Physical Chemistry A, 2009Ab initio multiple spawning simulations of the photochemical reaction dynamics of s-trans-1,3-butadiene were performed. It is found that nonadiabatic events involving two low-lying excited states begin as early as 10 fs after excitation, resulting in the population being split between the bright 1(1)B(u) state and the dark 2(1)A(g) state.
Benjamin G, Levine, Todd J, Martínez
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The multiple spawning pattern of weakfish in the Chesapeake Bay and Middle Atlantic Bight
Journal of Fish Biology, 1996Weakfish Cynoscion regalis were collected from commercial fisheries in the Chesapeake Bay and the Middle Atlantic Bight (n=4380) during 1989–1992 and their reproductive biology assessed using the gonadosomatic index, macroscopic gonad stages, oocyte diameter distributions, microscopic whole oocyte analysis and histology. Sex ratios were approximately 3:
S. K. Lowerre‐Barbieri +2 more
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Implementation of ab initio multiple spawning in the Molpro quantum chemistry package
Chemical Physics, 2008Abstract The ab initio multiple spawning (AIMS) method has been developed to solve the electronic and nuclear Schrodinger equations simultaneously for application to photochemical reaction dynamics. We discuss some details of the implementation of AIMS in the M olpro program package.
Benjamin G. Levine +3 more
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Breeding behaviour of the African frog, Chiromantis xerampelina: multiple spawning and polyandry
Animal Behaviour, 1992Abstract Breeding was observed in the foam-nest frog, Chiromantis xerampelina, in Hoedspruit, South Africa. The population had a 3-week breeding season with a male-biased operational sex ratio and asynchronous and unpredictable female arrival. Nests were built above water and at 14 out of 15 nests, from one to seven unpaired males (‘peripheral males’)
Michael D. Jennions +2 more
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Multiple nutrient subsidy pathways from a spawning migration of iteroparous fish
Freshwater Biology, 2014Summary Migratory animals can enhance ecosystem productivity through the delivery of material subsidies. Among fish, Pacific salmon are well known to deliver large quantities of nutrients to streams as they die after spawning, but the input pathways by which iteroparous species provide nutrient subsidies have not been resolved.
Evan S. Childress, Peter B. McIntyre
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Invertebrate Reproduction & Development, 1992
Summary Spawnings, larval occurrence and settlement of some marine invertebrates were examined over a six-year period at Lough Hyne, an inlet on the south coast of Ireland. Sea temperature rises were associated with multi-phyla spawnings, temperatures varied between years and greater numbers of larvae and greater settlements were noted in the warmer ...
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Summary Spawnings, larval occurrence and settlement of some marine invertebrates were examined over a six-year period at Lough Hyne, an inlet on the south coast of Ireland. Sea temperature rises were associated with multi-phyla spawnings, temperatures varied between years and greater numbers of larvae and greater settlements were noted in the warmer ...
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Mate and sperm competition during multiple-male spawnings of Atlantic salmon
Canadian Journal of Zoology, 1998The influence of sperm competition and individual mating behaviour in an externally fertilizing species of fish, the Atlantic salmon (Salmo salar), is estimated from video observations of multiple-male spawnings and subsequent paternity analyses. One male dominated the paternity during polygamous spawnings, fathering more than 80% of the progeny in a ...
I B Mjølnerød +3 more
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Age-Structure and Stability in Multiple-Age Spawning Populations
1981Fishery models which are based upon stock-recruitment relationships in which the total number of recruits decreases at large stock size (e.g., the Ricker model) are well-known to show very complicated dynamic behavior for some parameter values; in particular, the potential for the population to maintain stable constant population size is strongly ...
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