Abstract：
:The sperm duct epithelium of brook trout (Salvelinus fontinalis), mountedin vitro in Ussing-style epithelial chambers actively absorbs Na(+) (measured as the short-circuit current, Isc) and secretes K(+) (measured using(86)Rb(+) as tracer). Dibutyryl-cyclic-adenosine monophosphate (db-cAMP) and 3-isobutyl-1-methylxanthine (IMX) produce a rapid, sustained stimulation of both ion transport processes, but the hormone connected to the response is unknown. Purified sockeye salmon CON A2 gonadotropin (GtH) produces a dose-dependent, rapid and sustained rise in Na(+) uptake and K(+) secretion. The time course, electrophysiological and transport characteristics are similar to those evoked by IMX. Carbohydrate-poor (chum salmon CON A1) GtH is ineffective. Pretreatment of fish with 17α,20β-dihydroxy-4-pregnen-3-one (17α,20β-P) significantly increases milt volume but is without effect on resting or stimulated (IMX + db-cAMP) levels of sperm duct ion transport. This is the first indication of a direct, rapid action of GtH on ion transport by the vertebrate blood-testis barrier. The results suggest direct involvement of GtH in control of later stages of sperm maturation.
journal_name
Fish Physiol Biochemjournal_title
Fish physiology and biochemistryauthors
Marshall WS,Bryson SE,Idler DRdoi
10.1007/BF00004725subject
Has Abstractpub_date
1989-06-01 00:00:00pages
331-6issue
1-6eissn
0920-1742issn
1573-5168journal_volume
7pub_type
杂志文章abstract：:The present study evaluated, in an 18-month gilthead sea bream trial, the time course effects of genetics on individual size variation and growth compensation processes in families selected by heritable growth in the PROGENSA® breeding program. Families categorized as fast, intermediate, and slow growing had different...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/s10695-020-00899-1
更新日期：2020-11-13 00:00:00
abstract：:Spermiation and changes in androgen (testosterone, T and 11-ketotestosterone, 11-KT) levels were studied in sterlet (Acipenser ruthenus) treated with GnRH agonist implants (DAla(6)-Pro(9)-LHRHa) at 25 and 75 μg kg(-1) b.w. and compared with those males treated with 4 mg kg(-1) b.w. of carp pituitary extract (CPE) and ...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/s10695-012-9662-9
更新日期：2012-12-01 00:00:00
abstract：:Three cytosolic glutathione S-transferases [E.C. 2.5.1.18] were identified in liver of a marine flatfish, the plaice (Pleuronectes platessa) and the two major isoforms were purified to homogeneity. There was no evidence for the presence of basic transferases. The plaice GST's exhibited comparable hematin binding to ra...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/BF00003400
更新日期：1990-11-01 00:00:00
abstract：:Levels of reproductively-related steroids were determined in captive male sand tiger sharks, Carcharias taurus, maintained at two institutions: SeaWorld Adventure Park Orlando and the National Aquarium in Baltimore. Sexual conflicts were absent at the former, but were documented at the latter. Serum titers of 17beta-e...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/s10695-008-9202-9
更新日期：2008-12-01 00:00:00
abstract：:Studies on the digestive secretions in aquatic animals can elucidate certain aspects of their nutritive physiology. The aim of the present study was to compare the digestive lipase and phospholipase activities in ten marine species belonging to four classes following the taxonomic classification of marine organisms. A...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/s10695-012-9633-1
更新日期：2012-10-01 00:00:00
abstract：:Fish intestine is very sensitive to oxidative damage. Repair of damaged enterocytes may be involved to restore normal function of fish intestine. However, studies of fish enterocyte repair are scarce. The present study aimed to investigate the potential repair role of glutamine after a H2O2 challenge. In this study, f...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/s10695-014-9938-3
更新日期：2014-10-01 00:00:00
abstract：:The Indian major carp, mrigal (Cirrhinus mrigala), is a bottom-dwelling fish that can survive hypoxic episodes in its natural environment. We hypothesise that it can better survive hypoxic conditions by altering metabolic responses through GABA (Gamma-aminobutyric acid) supplementation. In the first experiment, the hy...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/s10695-019-00708-4
更新日期：2020-02-01 00:00:00
abstract：:Rhamdia quelen morphophysiological responses to propofol sedation were examined. The purpose was to investigate whether propofol would be a suitable drug to be used in fish transport procedures. Fish were exposed to 0, 0.4 or 0.8 mg L(-1) propofol for 1, 6 or 12 h in 40 L tanks, simulating open transport systems. Prop...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/s10695-014-9997-5
更新日期：2015-04-01 00:00:00
abstract：:The aims of the present study were to characterize sperm quality and to quantify seasonal changes in sexual hormone (testosterone [T], 11-ketotestosterone [11-KT] and 17,20β-dihydroxypregn-4-en-3-one [17,20β-P]) levels in male brill (Scophthalmus rhombus) plasma, as well as to test a more intensive sampling strategy t...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/s10695-012-9692-3
更新日期：2013-04-01 00:00:00
abstract：:The manner in which behavior influences the gonadotropin-releasing hormone (GnRH) axis in hermaphroditic fishes is not understood. The Gilthead seabream, Sparus aurata, is a protandrous hermaphrodite with a complex gonadal cycle consisting of a quiescent, pre-spawning, spawning, and post-spawning stage. On two separat...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/s10695-012-9757-3
更新日期：2013-08-01 00:00:00
abstract：:The yellow catfish Pelteobagrus fulvidraco with initial average weight 16.6 ± 0.17 g were fed three extruded diets for 56 days. Fish meal (FM) diet was formulated as the normal control with 380 g FM and 200 g soybean meal (SBM) kg-1 diet. The SBM diet was prepared with 220 g FM and 360 g SBM kg-1 diet without Lys or M...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章,随机对照试验
doi：10.1007/s10695-017-0437-1
更新日期：2018-02-01 00:00:00
abstract：:Autophagy is a cellular process which occurs in eukaryotic cells. To study the mechanism regulating polyploid fish growth and development is of significance in genetic, because of its growth advantages and economic values. This study focused on triploid female rainbow trout (RBT) which discusses the effects of autopha...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/s10695-017-0423-7
更新日期：2018-02-01 00:00:00
abstract：:The mudskipperB. boddaerti, was able to survive in waters of intermediate salinities (4-27‰). Fish submerged in dechlorinated tap water suffered 60% mortality by the fifth day while 60% of those in 100% sea-water (sw) died after the third day of exposure. After being submerged in 50% or 80% sw for 7 days, the plasma o...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/BF01987612
更新日期：1991-03-01 00:00:00
abstract：:This study describes the digestible protein (DP) and digestible energy (DE) utilization in juvenile mulloway, and determined the requirements for maintenance. This was achieved by feeding triplicate groups of fish weighing 40 or 129 g held at two temperatures (20 or 26 degrees C), on a commercial diet (21.4 g DP mJ DE...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/s10695-008-9296-0
更新日期：2010-03-01 00:00:00
abstract：:We have studied the seasonal relationship between growth and circulating growth hormone (GH), hepatic GH-binding and plasma insulin-like growth factor-I immunoreactivity in gilthead sea bream,Sparus aurata. The seasonal increase in plasma GH levels preceded by several weeks the summer increase in growth rates. In cont...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/BF00004358
更新日期：1994-07-01 00:00:00
abstract：:Red crucian carp (Carassius auratus red var.) is an ornamental fish with vivid red/orange color. It has been found that the adult body color of this strain forms a gray-to-red change. In this study, skin transcriptomes of red crucian carp are first obtained for three different stages of body color development, named b...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/s10695-017-0379-7
更新日期：2017-10-01 00:00:00
abstract：:The questions addressed in this study were: 1) whether insulin added to the incubation medium can down-regulate (125)I insulin binding to isolated hepatocytes of Atlantic salmon (Salmo salar) and rainbow trout (Oncorhynchus mykiss); 2) whether quantitative assessment of insulin processing can be made on isolated fish ...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/BF00004590
更新日期：1993-07-01 00:00:00
abstract：:Scrutiny of the zebrafish (Danio rerio) genomic database confirmed eight functional vitellogenin (vtg) genes, each with one or two transcript variants, and the encoded Vtg polypeptides were structurally and functionally characterized in detail by in silico and experimental analyses. There were five type I (vtgs1, 4, 5...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/s10695-018-0524-y
更新日期：2018-12-01 00:00:00
abstract：:In order to specify the timing of some changes in ovarian steroid production during the transition from vitellogenesis to ovulation, plasma hormones levels andin vivo andin vitro responses of the ovary to salmon gonadotropin (s-GtH) or dibutyryl-cyclic adenosine mono-phosphate (db-cAMP) were recorded in relationship w...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/BF02264076
更新日期：1986-10-01 00:00:00
abstract：:Protein digestibility by gastrointestinal homogenates of Dicentrarchus labrax, was investigated in 5 feeds in relation to their amino acids composition and their ability to sustain growth of D. labrax post larval juveniles. Gastric proteolysis was found to contribute <25% of the total proteolytic capacity. Correlation...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/BF00003377
更新日期：1995-10-01 00:00:00
abstract：:The objective of this study was to determine the effect of two levels of inclusion of xylan oligosaccharides (XOS) extracted from corncob on growth, feed utilization, immune status and disease resistance of Mediterranean sea bass (Dicentrarchus labrax) fingerlings. Specimens of 4.75 ± 0.69 g at initial density of 2.7 ...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/s10695-015-0110-5
更新日期：2015-12-01 00:00:00
abstract：:Spermatogenesis is a highly ordered process in the differentiation of male germ cells. Nuclear morphogenesis is one of the most fundamental cellular transformations to take place during spermatogenesis. These striking transformations from spermatogonia to spermatozoa are a result of phase-specific adaption of the cyto...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/s10695-017-0377-9
更新日期：2017-10-01 00:00:00
abstract：:River damming and building of hydroelectric power plants interrupt the reproductive migration routes and change the major physicochemical parameters of water quality, with drastic consequences for populations of migratory fishes. The goal of this study was to evaluate proliferation and cell death during spermatogenesi...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/s10695-012-9668-3
更新日期：2012-12-01 00:00:00
abstract：:The effects of chronic and periodic peaks of un-ionised ammonia (UIA-N) exposure on eye health and cataract formation in juvenile Atlantic halibut, Hippoglossus hippoglossus, were examined. Fish with mean initial weight 51.7 g (SD 13.2) were exposed to five treatments consisting of control group and three groups (Chro...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/s10695-011-9521-0
更新日期：2012-04-01 00:00:00
abstract：:The purpose of the current study was to examine seasonal changes in seawater tolerance and growth performance of anadromous Arctic charr (Salvelinus alpinus L.) held at the same temperature (8°C) during winter and summer. Charr (20-27 cm), previously reared in freshwater under natural photoperiod, were transferred eit...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/BF00004413
更新日期：1993-12-01 00:00:00
abstract：:Currently, the larviculture of many marine fish species with small-sized larvae depends for a short time after hatching, on the supply of high-quality live zooplankton to ensure high survival and growth rates. During the last few decades, the research community has made great efforts to develop artificial diets, which...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/s10695-018-0528-7
更新日期：2018-10-01 00:00:00
abstract：:The effects of acclimation temperature (15, 20, 25 °C) on routine oxygen consumption and post-exercise maximal oxygen consumption rates (MO2) were measured in juvenile shortnose sturgeon (Acipenser brevirostrum LeSueur, 1818). The routine MO2 of shortnose sturgeon increased significantly from 126.75 mg O2 h-1 kg-1 at ...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/s10695-017-0368-x
更新日期：2017-10-01 00:00:00
abstract：:Post mortem storage is a necessary process for removal of pin bones without destruction of fillets, thereby avoiding volume and economic loss. However, the enzymes involved in loosening pin bones during storage have not been studied to a great extent. In this study, the activities and localization of MMPs in the conne...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/s10695-016-0264-9
更新日期：2017-02-01 00:00:00
abstract：:Plasma levels of L-thyroxine (T4) and 3,5,3'-triiodo-L-thyronine (T3) and the percentage of plasma T4 and T3 present in the free (dialyzable) form (%FT4 and %FT3) were measured in 16 species (11 families) of tropical marine teleosts from an inshore Barbados reef. Mean plasma T4 varied from 0.2 ng/ml to 42 ng/ml; mean ...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/BF02180414
更新日期：1987-05-01 00:00:00
abstract：:For rainbow trout Oncorhynchus mykiss, high temperature is a major abiotic stress that limits its growth and productivity. In this study, spleen macrophage respiratory burst (RB), serum superoxide dismutase (SOD), serum malondialdehyde (MDA) and mRNA expression of the SERPINH1 (HSP47) gene in different tissues (liver,...
journal_title：Fish physiology and biochemistry
pub_type： 杂志文章
doi：10.1007/s10695-015-0170-6
更新日期：2016-04-01 00:00:00
