منابع مشابه
The Lesser-spotted Dogfish (scyliorhinus Canicula): Parasites and Scavenger Habits
The occurrence of parasites in the digestive tract of the lesser-spotted dogfish (Scyliorhinus canicula) caught in the north western Mediterranean was analysed and the results compared with infestation levels in samples of the same species caught in the Atlantic (off the south west coast of Ireland). The relationships between parasite levels and the scavenger habits of the lesser-spotted dogfis...
متن کاملAnatomy and development of the sinoatrial valves in the dogfish (Scyliorhinus canicula).
BACKGROUND We describe the adult anatomy and the development of the cardiac sinoatrial valves in the dogfish (Scyliorhinus canicula). METHODS We use scanning electron microscopy, histological and histochemical techniques in 39 hearts from embryos and adult specimens. RESULTS The sinoatrial valvular set of the adult dogfish is composed of two transverse valves laterally attached to the sinoa...
متن کاملCharacterisation of the TNF superfamily members CD40L and BAFF in the small-spotted catshark (Scyliorhinus canicula).
The tumour necrosis factor superfamily (TNFSF) members CD40L and BAFF play critical roles in mammalian B cell survival, proliferation and maturation, however little is known about these key cytokines in the oldest jawed vertebrates, the cartilaginous fishes. Here we report the cloning of CD40L and BAFF orthologues (designated ScCD40L and ScBAFF) in the small-spotted catshark (Scyliorhinus canic...
متن کاملThe Role of the Cardiac Vagus in the Response of the Dogfish Scyliorhinus Canicula to Hypoxia
1. During normoxia, heart rate was governed by a vagal tone which increased at higher acclimation temperatures. This tonic influence was exerted predominantly via the branchial cardiac nerves. The increase in heart rate following atropinization or cardiac vagotomy was associated with a reduction in stroke flow in the ventral aorta in accordance with Starling's Law of the heart. 2. During slowly...
متن کاملMetal accumulation and metallothionein induction in the spotted dogfish Scyliorhinus canicula.
Recent studies indicate that elasmobranch fish respond differently to metal exposure than marine teleosts. Accumulation rates can be high, which despite the fact that normal background levels for metals in the marine environment are low, is worrying due to the long life span and late fecundity of most shark. The goals of the present study were to examine differences in accumulation rates and to...
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ژورنال
عنوان ژورنال: Journal of the Marine Biological Association of the United Kingdom
سال: 1961
ISSN: 0025-3154,1469-7769
DOI: 10.1017/s0025315400023894