Weekly variations in body weight and plasma testosterone concentrations in the captive male possum, Trichosurus vulpecula.

abstract：:Pancreatic polypeptide (PP) has been isolated from pancreatic extracts of the herring gull (Larus argentatus) using a radioimmunoassay employing an antiserum (PP 221), generated to the conserved C-terminal hexapeptide amide of mammalian PP. Gel permeation and reverse-phase HPLC fractionation of crude pancreatic extrac...

journal_title：General and comparative endocrinology

authors： Barton CL,Shaw C,Halton DW,Thim L

更新日期：1994-02-01 00:00:00

abstract：:The distribution and identity of the various endocrine cell types were examined in the pancreas, stomach, and anterior intestine of the phylogenetically ancient actinopterygian, the gar (Lepisosteus osseus L.), using immunohistochemistry. Antisera used were directed against several insulins (INSs) and somatostatins (S...

journal_title：General and comparative endocrinology

authors： Groff KE,Youson JH

更新日期：1997-04-01 00:00:00

abstract：:To examine the production of steroids with potential oocyte maturation-inducing or pheromonal activity in the goldfish (Carassius auratus) we have incubated mature ovaries of this species with 17-[3H]hydroxyprogesterone. The metabolites in the unconjugated, glucuronide, and sulfate fractions were identified by chromat...

journal_title：General and comparative endocrinology

authors： Kime DE,Scott AP,Canario AV

更新日期：1992-09-01 00:00:00

abstract：:The peroxidase-antiperoxidase (PAP) immunocytochemical technique and rabbit antihuman prolactin (PRL) antiserum were used to localize and identify PRL-producing cells in the pars distalis of Bufo calamita, Hyla meridionalis, Alytes cisternasii, Pelobates cultripes, and Rana perezi tadpoles at different stages of devel...

journal_title：General and comparative endocrinology

authors： Garcia-Navarro S,Malagon MM,Garcia-Herdugo G,Gracia-Navarro F

更新日期：1988-02-01 00:00:00

abstract：:The melanocortin-3 receptor (MC3R) is known to be involved in regulation of energy homeostasis, regulating feed efficiency and nutrient partitioning in mammals. Its physiological roles in non-mammalian vertebrates, especially economically important aquaculture species, are not well understood. Channel catfish (Ictalur...

journal_title：General and comparative endocrinology

authors： Yang LK,Zhang ZR,Wen HS,Tao YX

更新日期：2019-06-01 00:00:00

abstract：:The neurosecretory caudo-dorsal cells (CDC) of the basommatopora Lymnaea stagnalis produce an ovulation hormone (CDCH), which is released at the periphery of the intercerebral commissure (COM). A rapid in vivo bioassay for CDCH has been established and is based on the dose-dependent relationship between the quantity o...

journal_title：General and comparative endocrinology

authors： Dogterom GE,Bohlken S,Geraerts WP

更新日期：1983-06-01 00:00:00

abstract：:Changes in plasma levels of steroid hormones in pre-spawning chum salmon (Oncorhynchus keta) were examined for 6 years in association with sexual maturation. Fish were sampled along their homing pathway from the coastal sea to the spawning ground from 1995 to 2000. Plasma levels of testosterone (T), 11-ketotestosteron...

journal_title：General and comparative endocrinology

authors： Onuma T,Higashi Y,Ando H,Ban M,Ueda H,Urano A

更新日期：2003-09-01 00:00:00

abstract：:The objective of this study was to examine if RU486, a corticosteroid antagonist, modified hepatocyte metabolism and blocked the metabolic effects of exogenously administered cortisol in rainbow trout (Oncorhynchus mykiss). The fish were given a single intraperitoneal implant of either coconut oil alone or coconut oil...

journal_title：General and comparative endocrinology

authors： Vijayan MM,Reddy PK,Leatherland JF,Moon TW

更新日期：1994-10-01 00:00:00

abstract：:In 1974, a lack of 5α-dihydrotestosterone (5α-DHT), the most potent androgen across species except for fish, was shown to be the origin of a type of pseudohermaphrodism in which boys have female-like external genitalia. This human intersex condition is linked to a mutation in the steroid-5α-reductase type 2 (SRD5α2) g...

journal_title：General and comparative endocrinology

authors： Robitaille J,Langlois VS

更新日期：2020-05-01 00:00:00

abstract：:The concentrations of norepinephrine in hypothalamus and norepinephrine and epinephrine in head kidney were significantly decreased in treated tilapia (Oreochromis aureus) during the time course of cold exposure (12 degrees) as compared to the control (25 degrees). The elevation of norepinephrine and epinephrine in pl...

journal_title：General and comparative endocrinology

authors： Chen WH,Sun LT,Tsai CL,Song YL,Chang CF

更新日期：2002-03-01 00:00:00

abstract：:A highly specific and homologous radioimmunoassay (RIA) for the measurement of prolactin (PRL) in the plasma and the pituitary of the eel was developed using a rabbit antiserum to eel PRL. PRL was purified from the pituitary of Japanese eel (Anguilla japonica). Pituitary extracts and plasma from the Japanese and Europ...

journal_title：General and comparative endocrinology

authors： Suzuki R,Hirano T

更新日期：1991-03-01 00:00:00

abstract：:We analyzed the participation of sympathetic ovarian innervation in the prepubertal female guinea pig on regulation of compensatory ovarian hypertrophy (COH) and compensatory ovulation at puberty. The COH of the left ovary was significantly higher that of the right one (left ovary: 41.5+/-5.2 vs. 27.5+/-5.6%, p<0.05, ...

journal_title：General and comparative endocrinology

authors： Riboni L

更新日期：2002-07-01 00:00:00

abstract：:The administration of arginine vasotocin (AVT) to gravid snapping turtles with steroidogenically active corpora lutea and high plasma progesterone concentration (1480 +/- 155 pg/ml) did not trigger oviposition, whereas 12 days after ovulation when luteolysis occurred and plasma progesterone concentration was low (570 ...

journal_title：General and comparative endocrinology

authors： Mahmoud IY,Cyrus RV,McAsey ME,Cady C,Woller MJ

更新日期：1988-01-01 00:00:00

abstract：:Hagfish, Myxine glutinosa, were used in a series of experiments to determine a possible role for calcitonin in plasma and urine electrolyte balance. Individual animals were anaesthetised and implanted with polythene cannulae for monitoring blood pressure and for infusion/injection. Urine was collected by manual palpat...

journal_title：General and comparative endocrinology

authors： Wales NA

更新日期：1988-07-01 00:00:00

abstract：:The response of plasma prolactin (PRL) to manipulations of plasma calcium were investigated in coho salmon. Injection of 3.16 mumol EGTA/10 g body weight (to reduce the plasma calcium activity) resulted in significantly higher plasma PRL levels. Lower doses of EGTA (1.06 and 2.13 mumol/10 g body wt) had no effect on p...

journal_title：General and comparative endocrinology

authors： Fargher RC,McKeown BA

更新日期：1989-03-01 00:00:00

abstract：:Isospecific injections of intercerebral commissure (COM) extracts of L. stagnalis, L. palustris, and L. ovata (Lymnaeidae) and of extracts of COM/mediodorsal bodies complexes (COM/DB) of Bulinus truncatus (Bulinidae) and Biomphalaria glabrata (Planorbidae) induced oviposition in a high percentage of the experimental s...

journal_title：General and comparative endocrinology

authors： Dogterom GE,van Loenhout H

更新日期：1983-10-01 00:00:00

abstract：:The arginine vasotocin/vasopressin (AVT/AVP) and gonadotropin releasing hormone (GnRH) systems are known to control sexual behaviors and reproduction, respectively, in different vertebrate groups. However, a direct functional connection between these two neuroendocrine systems has not been demonstrated for any vertebr...

journal_title：General and comparative endocrinology

authors： Kline RJ,Holt GJ,Khan IA

更新日期：2016-01-01 00:00:00

abstract：:The copepod Calanus finmarchicus is the most abundant zooplankton species in the North Atlantic. While the life history of this crustacean is well studied, little is known about its peptidergic signaling systems despite the fact that these pathways are undoubtedly important components of its physiological/behavioral c...

journal_title：General and comparative endocrinology

authors： Christie AE,Roncalli V,Wu LS,Ganote CL,Doak T,Lenz PH

更新日期：2013-06-15 00:00:00

abstract：:In hamsters, the Harderian glands (HGs) exhibit a marked sexual dimorphism which is thought to depend on dihydrotestosterone (DHT); however, it is unclear whether hamster HGs contain one or more 5 alpha-reductases and whether these enzymes are differentially expressed in males and females. In this study, we isolated s...

journal_title：General and comparative endocrinology

authors： Ramos L,Chávez B,Vilchis F

更新日期：2010-04-01 00:00:00

abstract：:To investigate whether a differential potency on vitellogenesis exists between the carp gonadotropin (cGTH) and fraction I-cGTH (proteins from cGTH unbound on concanavalin A-Sepharose, which represent 5% of cGTH in weight), hypophysectomized Gobius niger were treated with the two hormonal preparations at the same leve...

journal_title：General and comparative endocrinology

authors： Le Menn F,Burzawa-Gérard E

更新日期：1985-01-01 00:00:00

abstract：:Kisspeptin is a potent regulator of the hypothalamo-pituitary-gonadal axis. The activation of several vernal and pubertal behaviors involves the action of locally synthesized estradiol by hypothalamic aromatase-expressing neurons. Little is known about kisspeptin in non-mammalian systems, and its interaction with arom...

journal_title：General and comparative endocrinology

authors： Saldanha CJ,Walters BJ,Fraley GS

更新日期：2010-05-01 00:00:00

abstract：:Endocrine cells in the gut of Sparus auratus L. (gilt-head sea bream) have been demonstrated by immunocytochemical and electron microscopic techniques. Cells showing somatostatin and gastrin-like immunoreactivity were found in the depth of the gastric folds and in the upper part of the stomach glands while substance P...

journal_title：General and comparative endocrinology

authors： Elbal MT,Agulleiro B

更新日期：1986-12-01 00:00:00

abstract：:Understanding reproductive profiles and timing of reproductive events is essential in the management and conservation of humpback whales (Megaptera novaeangliae). Yet compared to other parameters and life history traits, such as abundance, migratory trends, reproductive rates, behavior and communication, relatively li...

journal_title：General and comparative endocrinology

authors： Cates KA,Atkinson S,Gabriele CM,Pack AA,Straley JM,Yin S

更新日期：2019-08-01 00:00:00

abstract：:Stress is a known inhibitor of reproductive function. The mechanisms by which stress acts to influence the reproductive axis have been intensely studied and appear to be extremely varied. Gonadotropin-releasing hormone (GnRH) is a critical component of the vertebrate reproductive axis and directly causes pituitary gon...

journal_title：General and comparative endocrinology

authors： Calisi RM,Rizzo NO,Bentley GE

更新日期：2008-07-01 00:00:00

abstract：:Serum levels of prolactin were determined in nonbreeding male and female canvasbacks (Aythya valisineria) from mid-April to late June to evaluate the temporal changes occurring during spring. During this time interval, serum prolactin levels increased 1.5- to 2-fold in both males and nonlaying females (P less than 0.0...

journal_title：General and comparative endocrinology

authors： Bluhm CK,Phillips RE,Burke WH

更新日期：1989-11-01 00:00:00

abstract：:Urinary excretion of the thyroid hormones (TH) L-thyroxine (T4), and 3,5,3'-triiodo-L-thyronine (T3) and their derivatives was studied in urinary-catheterized rainbow trout (mean wt. 227 g) fasted for 2 days under a 12-hr L:12-hr D photocycle in running water (12 degrees). Catheterized trout were intracardiac-injected...

journal_title：General and comparative endocrinology

authors： Parry JE,Zhang C,Eales JG

更新日期：1994-08-01 00:00:00

abstract：:Melatonin and arylalkylamine N-acetyltransferase (AANAT), the rate-limiting enzyme in melatonin synthesis, have taken on special importance in vertebrate circadian biology. Recent identification of genes encoding two AANAT (AANAT(1) and AANAT(2)) and two subtypes of melatonin receptor (Mel-R; Mel(1a) and Mel(1b)) in s...

journal_title：General and comparative endocrinology

authors： Shi Q,Ando H,Coon SL,Sato S,Ban M,Urano A

更新日期：2004-05-01 00:00:00

abstract：:The neotropical genus Mabuya are obligate placentotrophic viviparous lizards, which have a short vitellogenesis that produces microlecithal oocytes and a prolonged time of gestation (9 to 10 months). The hormonal control of female reproductive activity during follicular growth and pregnancy has not been studied, altho...

journal_title：General and comparative endocrinology

authors： Barbosa-Moyano H,Rodríguez-Chaparro S,Santos RLSR,Ramírez-Pinilla MP

更新日期：2020-09-01 00:00:00

abstract：:The endocannabinoid system is a major regulator of food intake in many animal species. Studies conducted so far have mostly focused on mammals, and, therefore, in this study, the role of the endocannabinoid system in food intake in the sea bream Sparus aurata was investigated. The effect of different doses of the endo...

journal_title：General and comparative endocrinology

authors： Piccinetti CC,Migliarini B,Petrosino S,Di Marzo V,Carnevali O

更新日期：2010-04-01 00:00:00

abstract：:Salmonids have four subtypes of insulin-like growth factor binding protein (IGFBP)-1, termed -1a1, -1a2, -1b1 and 1b2, owing to teleost- and a lineage-specific whole-genome duplications. We have previously produced recombinant proteins of masu salmon IGFBP-1a1 and -1b2 and conducted functional analysis. To further cha...

journal_title：General and comparative endocrinology

authors： Hasegawa R,Miura T,Kaneko N,Kizaki R,Oishi G,Tanaka H,Sato M,Shimizu M

更新日期：2020-12-01 00:00:00