Planktonic ostracods from the Canary Island Region; their depth distributions, diurnal migrations, and community organization

Abstract

The ostracods have been analysed from a day and night series of horizontal tows taken near the Island of Fuerteventura (Canaries). Thirty-five species were identified. Nineteen species were sampled in large enough numbers to describe their depthe distributions and the ranges of their vertical migrations. Seven species were too small to have been adequately sampled by the methods used, and the remaining nine species were too rare to draw any firm conclusions as to their depth ranges.

Patterns of vertical distribution and migration of zooplankton at Ocean Station “P”1

“…If the responses oceanic data in general. We think that a of animals to their own density depends on similar conclusion can be drawn from the a linear function of the density, then im-data of the SOND cruise to temperate htportant differences in density are made to lantic waters ( Angel 1969;Baker 1970;Foxlook insignificant by the semilog presentaton 1969Foxlook insignificant by the semilog presentaton , 1970aRoe 1972a,h,c,cE), if horition. We feel, however, that linear plots zontal variability comparable to that we would misrepresent the precision of our found is assumed to affect their data.…”

Die vertikale verteilung und t�gliche migration der hydromedusen (Hydrozoa: Coelenterata) in der Bucht von Eilat (Rotes Meer)

“…Die Mehrzahl der neueren Untersuchungen fiber bathymetrische Verteilungen sind an Copepoden (Raymoat, i963; Moraitou-Apostolopoulou, 1971), Ostraeoden (Angel, 1969) oder Decapodenlarven (Foxton,~970a,b) durchgeffihrt worden. Ffir Laborversuche (Lincoln, 1970) …”

Cytogenetic studies on marine myodocopid Ostracoda: the karyotypes of some species of halocyprids

“…They found that 'the frequency and duration of sinking in an undisturbed ostracod may be related to the magnitude of its diurnal vertical migration. Thus, natural sinking was least common in C. haddoni a species for which Angel (1969) found no evidence of vertical migration, and most frequent in C. irnbricara which according to Angel (1969) migrates vertically as much as S00m. ' Angel (1970) also points out that the large vertical migrations undertaken by some ostracods must involve active downward swimming as well as passive sinking.…”