We hypothesize that the capture of elasmobranchs
would be reduced with hooks containing magnets in comparison with control hooks in hook-and-line and longline studies.
From personal observations, there has been a steady increase in recreational anglers targeting elasmobranchs
because of a reduction in the availability of other favoured teleost species.
Indeed, it has been estimated that approximately two thirds of the elasmobranchs
caught as bycatch in Australia's northern prawn trawl fishery die while in the net (Stobutzki et al.
In general, an annual vertebral growth ring is composed of one opaque band (representing faster summer growth) and one translucent band (representing winter growth), although the periodicity of deposition may be different for some elasmobranchs
(Cailliet and Goldman, 2004; Caillet et al.
Karatajute-Talimaa (1997b) erected the elasmobranch
order Lugalepidida based on the characteristics of pectoral and pelvic fins, complex scales in which the odontodes (polyodontodia) of the crown are formed of orthodentine, and the non-growing base of acellular bone tissue; there is no horizontal canal system on the boundary between the crown and the basal plate.
Artisanal fishermen target demersal teleosts and elasmobranchs
(Gutierrez-Uribe 1987; Ramirez-Rodriguez 1987; Villavicencio-Garayzar 1995).
In addition to the angling derbies, an archery derby for elasmobranchs
in Elkhorn Slough was initiated in the mid 1980's and continued until the mid 1990's, but it took only a small traction of the elasmobranchs
that were caught in the angling derbies.
This article highlights the need to continue life history studies of elasmobranch
species throughout different regions and ocean basins.
The locomotor behavior of spinal elasmobranchs
with an analysis of stinging in Urobatis.
observed from submersibles of Bermuda, Grand Cayman, and Freeport, Bahamas.
Direct and indirect fishery effects on small coastal elasmobranchs
in the northern Gulf of Mexico.
Historically, fisheries have targeted elasmobranchs
to supply the liver-oil or "squalene" market (Holts, 1988; Last and Stevens, 1994).
In some commercial fishing operations, elasmobranchs
represent a significant amount of discarded bycatch.
One of the main drawbacks in the assessment and management of elasmobranchs
is the lack of biological information and suitable fisheries data (Pawson and Vince, 1999; Herndon et al.
Taniuchi (Editors), Elasmobranchs
as living resources: advances in biology, ecology, systematics and the status of the fisheries, p.