نتایج جستجو برای: commercial fishes

تعداد نتایج: 157132  

2005
Kevin L. Pope Gene R. Wilde Daryl L. Bauer

We correlated maximum lengths of freshwater fishes captured during 10 years with standard gears (i.e., gill nets, boat electrofishers and trap nets) and angling from Nebraska water bodies to determine which methodology provided better estimates of maximum size of fishes produced within a given water body. In general, maximum length of fishes captured with standard gears was smaller than maximum...

2007
C. J. BRAUNER M. BERENBRINK

1. I ntroduction 2. P artitioning of O2 and CO2 Exchange Across the Respiratory Surfaces 2.1. P rimitive Ray‐Finned Fishes (Actinopterygii) 2.2. L obe‐Finned Fishes (Sarcopterygii) 2.3. J awless Fishes (Agnatha) 3. B lood O2 Transport 3.1. G eneral Principles of Hb Function 3.2. F actors AVecting the ArterioVenous O2 DiVerence 3.3. S urvey of Extant Primitive Fishes 4. T ransport and Eliminatio...

This study was conducted to determine density and distribution of commercial fishes (Argyrops spinifer- Carangoindes talamparoides and Saurdia tumbil)  by swept area method in Persian Gulf waters (Busher province). Sampling operation (27 hauls) was done by a trawler (Tabas class) with long 26 m and width 7.4 m in fishing season. Midwater trawl ned had a 72 m head rope and mesh sizes were 400 mm...

Journal: :iranian journal of fisheries science 0
z.a. muchlisin m. nazir n. fadli m. adlim a. hendri m. khalil

the acehnese mahseer, locally known as keureling, tor tambra is one of the highest economically valued freshwater fishes found in aceh waters. the culture of t. tambra was initiated in aceh province, indonesia more than five years ago. however, the growth rate in captivity has been low, probably due to feeding problems. hence, the objective of the present study was to evaluate the optimum level...

2008
JOSEPH J. LUCZKOVICH DAVID A. MANN RODNEY A. ROUNTREE

—Many fishery biologists that are interested in documenting fish habitat and following the movements and behavior of fishes use acoustic tags. Because over 700 fish species naturally produce lowfrequency, species-specific sounds, these can be used as natural acoustic tags. Passive acoustic approaches (monitoring sound-producing fishes with hydrophones) show great promise for gathering data in a...

Journal: :international journal of aquatic biology 0
arunkumar shetty department of p.g. studies and research in applied zoology, kuvempu university, shankaraghatta, 577 451 karnataka. mididodi venkateshwarlu department of p.g. studies and research in applied zoology, kuvempu university, shankaraghatta, 577 451. karnataka. murugan muralidharan sri paramakalyani centre for environmental scieces, manonmaniam sundaranar university, alwarkurichi, 627 412. tamilnadu

the fish assemblage and diversity in relation to water quality of three coastal rivers sita, swarna and varahi of udupi district, karnataka, india was studied. 71 species representing 7 orders, 20 families and 41 genera were recorded from 21 sites along the three rivers. species composition varied longitudinally in relation to the environmental factors of the habitat. the downstream change in t...

2010
T. J. Pilger K. B. Gido D. L. Propst

The upper Gila River basin is one of the few unimpounded drainage basins west of the Continental Divide, and as such is a stronghold for endemic fishes in the region. Nevertheless, multiple nonindigenous fishes potentially threaten the persistence of native fishes, and little is known of the trophic ecology of either native or nonnative fishes in this system. Gut contents and stable isotopes (C...

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