نتایج جستجو برای: conserving fish habitat

تعداد نتایج: 162848  

Journal: :Isotopes in environmental and health studies 2003
B Fry K C Ewel

Mangrove forests are important coastal wetlands in most of the tropics, but their importance to fisheries is poorly understood. Rationales for conserving these ecosystems are partly based on ideas that mangroves are important to food webs that support fisheries. Here we review use of stable isotopes to test the strength of the mangrove forest-fish connection, suggesting that a dual focus on bot...

Journal: :Ecological applications : a publication of the Ecological Society of America 2007
Alan M Friedlander Eric K Brown Mark E Monaco

In order to properly determine the efficacy of marine protected areas (MPAs), a seascape perspective that integrates ecosystem elements at the appropriate ecological scale is necessary. Over the past four decades, Hawaii has developed a system of 11 Marine Life Conservation Districts (MLCDs) to conserve and replenish marine resources around the state. Initially established to provide opportunit...

2013
Ismael A. Kimirei Ivan Nagelkerken Yunus D. Mgaya Chantal M. Huijbers

Mangroves and seagrass beds have long been perceived as important nurseries for many fish species. While there is growing evidence from the Western Atlantic that mangrove habitats are intricately connected to coral reefs through ontogenetic fish migrations, there is an ongoing debate of the value of these coastal ecosystems in the Indo-Pacific. The present study used natural tags, viz. otolith ...

ژورنال: بوم شناسی آبزیان 2014
Zamani Faradonbeh, Mazaher , Eagderi, Soheil , Hashemzadeh Segherloo, Iraj , Tabatabaei, Seyedeh Narjes,

Considering the fact that fish biodiversity conservation and land uses planning, require reliable information about fish distribution and habitat use patterns In order to describe species habitat properties, habitat use and habitat selectivity indices are applied. Relative frequency and environmental variables, depth, width, slope of river, altitude, velocity, substrate, Overstream canopy closu...

2015
Steven B. Scyphers Tarik C. Gouhier Jonathan H. Grabowski Michael W. Beck John Mareska Sean P. Powers Maura (Gee) Geraldine Chapman

Habitat loss and fragmentation are leading causes of species extinctions in terrestrial, aquatic and marine systems. Along coastlines, natural habitats support high biodiversity and valuable ecosystem services but are often replaced with engineered structures for coastal protection or erosion control. We coupled high-resolution shoreline condition data with an eleven-year time series of fish co...

2010
M. BRETT GALLAGHER SELINA S. HEPPELL

—The habitat needs of nearshore juvenile rockfish Sebastes spp. have rarely been studied but are an essential component of habitat identification for management. We investigated the relationships between habitat type, species composition, and growth of juvenile rockfish after settlement into nearshore reefs and estuaries in central Oregon. We identify and prioritize essential fish habitat (EFH)...

2014
David H Williamson Daniela M Ceccarelli Richard D Evans Geoffrey P Jones Garry R Russ

Severe climatic disturbance events often have major impacts on coral reef communities, generating cycles of decline and recovery, and in some extreme cases, community-level phase shifts from coral-to algal-dominated states. Benthic habitat changes directly affect reef fish communities, with low coral cover usually associated with low fish diversity and abundance. No-take marine reserves (NTRs) ...

2015
Bruce A. Manny Edward F. Roseman Gregory Kennedy James C. Boase Jaquelyn M. Craig David H. Bennion Jennifer Read Lynn Vaccaro Justin Chiotti Richard Drouin Rosanne Ellison

Loss of functional habitat in riverine systems is a global fisheries issue. Few studies, however, describe the decision-making approach taken to abate loss of fish spawning habitat. Numerous habitat restoration efforts are underway and documentation of successful restoration techniques for spawning habitat of desirable fish species in large rivers connecting the Laurentian Great Lakes are repor...

2006
I. D. Williams W. J. Walsh A. Miyasaka A. M. Friedlander

No-take marine reserves can be effective biodiversity conservation and fisheries management tools, but as yet there is little indication of whether rotational management, i.e. alternately closing and opening an area to fishing, might also confer such benefits on coral reef fish stocks. Using data taken from the state of Hawaii’s long-term reef monitoring program, we have assessed the effects of...

2017
Chris Taylor Natasha Cadenhead David B Lindenmayer Brendan A Wintle

Setting aside protected areas is a key strategy for tackling biodiversity loss. Reserve effectiveness depends on the extent to which protected areas capture both known occurrences and areas likely to support the species. We assessed the effectiveness of the existing reserve network for Leadbeater's Possum (Gymnobelideus leadbeateri) and other forest-dependent species, and compared the existing ...

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