Results 121 to 130 of about 41,831 (231)

Growth and mortality of Sphoeroides testudineus (Tetraodontiformes: Tetraodontidae) in a tropical coastal lagoon in northwestern Yucatán Peninsula Crecimiento y mortalidad de Sphoeroides testudineus (Tetraodontiformes: Tetraodontidae) en una laguna costera tropical en el noroeste de la península de Yucatán

open access: yesRevista Mexicana de Biodiversidad, 2012
This study reports growth parameters and mortality for Sphoeroides testudineus from La Carbonera, a karstic tropical coastal lagoon on the northwestern coast of the Yucatán Peninsula, Mexico. A total of 461 specimens were collected between April 2009 and
José Luis Bonilla-Gómez   +3 more
doaj  

Systems thinking and practice for action research [PDF]

open access: yes, 2008
This chapter offers some grounding in systems thinking and practice for doing action research. There are different traditions within systems thinking and practice which, if appreciated, can become part of the repertoire for practice by action researchers.
Ison, R. L.
core  

Anthropogenic Harvesting Pressure and Changes in Life History: Insights from a Rocky Intertidal Limpet

open access: yes, 2012
The importance of large breeding individuals for maintaining the health of marine fish and invertebrate populations has long been recognized. Unfortunately, decades of human harvesting that preferentially remove larger individuals have led to drastic ...
Fenberg, Phillip B., Roy, Kaustuv
core   +1 more source

Modelación del crecimiento individual del callo de hacha Atrina maura (Bivalvia: Pinnidae) a partir de la inferencia multi modelo

open access: yesRevista de Biología Tropical, 2013
El molusco bivalvo Atrina maura (Sowervy 1835) habita aguas marinas someras y estuarios en la costa del Pacífico desde Baja California, México hasta Perú. Es un organismo cuyo crecimiento individual ha sido insuficientemente modelado.
Eugenio Alberto Aragón-Noriega
doaj  

Age, Growth, Life History, and Fisheries of the Sand Sole, Psettichthys melanostictus [PDF]

open access: yes, 2005
Sand sole, Psettichthys melanostictus, is a small but important part of the west coast groundfish fishery. It has never been assessed and there is a limited amount of biological data for the species.
McNally, Samuel V. G.   +1 more
core  

Life-history variation and age at maturity in Eurasian Perch (Perca fluviatilis L.) [PDF]

open access: yes, 2003
This thesis deals with life-history variation in perch, with special focus on age at maturity. We conducted field studies to uncover the variation within short geographic distances and a literature review to study variation on a large geographic scale in
Heibo, Erik
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Population characteristics and biology of striped marlin, Tetrapturus audax in the New Zealand fishery : a thesis presented in partial fulfillment of the requirements for the degree of Master of Science (MSc) in Physiology at Massey University, Palmerston North, New Zealand [PDF]

open access: yes, 2005
Striped marlin (Tetrapturus audax) are apex predators in the pelagic ecosystem and are seasonally abundant in the off-shore waters of New Zealand during December through May.
Kopf, R. Keller
core  

Estimation of growth in intact grazing Holstein steers

open access: yesRevista Colombiana de Ciencias Pecuarias, 2013
Summary Background: animal growth does not follow a linear pattern. Accordingly, fitted non-linear models are used to analyze the relationship between growth rate and age. Objective: to assess the ability of several mathematical models (Gompertz, Brody,
Raul Velásquez Vélez   +4 more
doaj  

Stock assessment of the gulf menhaden, Brevoortia patronus, fishery [PDF]

open access: yes, 1987
A stock assessment of the gulf menhaden. Brevoortia patronus, fishery was conducted with data on purse-seine landings from 1946 to 1985 and port sampling data from 1964 to 1985.
Vaughan, Douglas S.
core  

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