Seasonal variation in egg morphology and hatching success in the calanoid copepods Temora longicornis, Acartia clausi and Centropages hamatus
نویسندگان
چکیده
منابع مشابه
Reproductive cycles of dominant calanoid copepods in the North Sea
The seasonal cycles of reproduction of the dominant copepods Acartia clausi, Temora longicornis, Centropages hamatus, C. typicus and Pseudocalanus spp. were studied at Helgoland Roads, southern North Sea. Egg production rate, clutch size, number of spawning females and prosome length were compared with temperature and phytoplankton concentration. Female A. clausi, T. longicornis and Pseudocalan...
متن کاملSeasonal cycles of egg production of two planktonic copepods, Centropages typicus and Temora stylifera, in the north-western Mediterranean Sea
The reproductive biology of copepods plays a key role in seasonal population oscillations and therefore determines, among other things, annual production (Kiørboe et al., 1988; Fransz et al., 1989; Ianora and Buttino, 1990; Ianora et al., 1992; Halsband and Hirche, 2001). Reproduction is affected by various environmental factors, basically by temperature and food availability (Dagg, 1978; Landr...
متن کاملHeterospecific mating and partial prezygotic reproductive isolation in the planktonic marine copepods Centropages typicus and Centropages hamatus
Using three-dimensional (3D) video observations in laboratory experiments, I describe interspecific and intergeneric mating behaviors and motility patterns of the common planktonic marine copepods Centropages typicus, Centropages hamatus, and Temora longicornis. These observations are then used to estimate heterospecific and conspecific male mate-search volume rates and mate encounter rates in ...
متن کاملPopulation structure of the copepods Centropages typicus and Temora stylifera in different environmental conditions
The population structure (NI to adults) of the copepods Centropages typicus and Temora stylifera was investigated in parallel at two sites in the eutrophic and oligotrophic waters of the Gulf of Naples (Tyrrhenian Sea) with the aim of identifying the environmental factors that modulate the occurrence of these calanoids that are abundant in the neritic waters of the Mediterranean Sea. Monthly zo...
متن کاملGrazing in a turbulent environment: behavioral response of a calanoid copepod, Centropages hamatus.
Models of marine ecosystem productivity rely on estimates of small-scale interactions, particularly those between copepods and their algal food sources. Rothschild and Osborn [Rothschild, B. J. & Osborn, T. R. (1988) J. Plankton Res. 10, 465-474], hypothesized that small-scale turbulence in aquatic systems increases the perceived abundance of prey to predators. We tested this hypothesis by expo...
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ژورنال
عنوان ژورنال: Journal of Plankton Research
سال: 2003
ISSN: 1464-3774
DOI: 10.1093/plankt/25.5.527