Variations of calcitonin-like immunoreactivity in the crustacean Orchestia cavimana during a molt cycle.

abstract：:Seasonal and daily variation in basal plasma concentrations of corticosterone and the effect of short-term confinement on plasma corticosterone concentration were examined in wild adult male and female tuatara (Sphenodon punctatus) on Stephens Island, New Zealand. Males and females sampled immediately upon capture at ...

journal_title：General and comparative endocrinology

authors： Tyrrell CL,Cree A

更新日期：1998-05-01 00:00:00

abstract：:In the gilthead sea bream (Sparus auratus) 17β-estradiol (E₂) plays an important role in the synthesis of vitellogenin. During vitellogenesis, vitellogenin as a nutritional precursor protein is loaded with calcium, which requires elevated plasma calcium levels. This is accomplished via E₂-dependent processes. Reports ...

journal_title：General and comparative endocrinology

authors： Bevelander GS,Guerreiro PM,Spanings T,Flik G

更新日期：2011-08-01 00:00:00

abstract：:In mammals ghrelin has a diverse range of effects including stimulation of gut motility but although present in teleost fish its effects on motility have not been investigated. The present study used bioinformatics to search for fish paralogues of the ghrelin receptor and the closely related motilin receptor, and inve...

journal_title：General and comparative endocrinology

authors： Olsson C,Holbrook JD,Bompadre G,Jönsson E,Hoyle CH,Sanger GJ,Holmgren S,Andrews PL

更新日期：2008-01-01 00:00:00

abstract：:Human and wildlife are exposed at critical periods of development to endocrine disruptor chemicals (EDC) that may be responsible for reproductive disorders. To test the hypothesis that in ovum exposure to EDC at a critical period for gonadal organogenesis alters post-hatching folliculogenesis and steroidogenesis in Ca...

journal_title：General and comparative endocrinology

authors： Stoker C,Beldoménico PM,Bosquiazzo VL,Zayas MA,Rey F,Rodríguez H,Muñoz-de-Toro M,Luque EH

更新日期：2008-05-01 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：:There are more CRH-like immunoreactive neurons in the preoptic nucleus and nucleus lateralis tuberis in the brain of feral brown trout, Salmo trutta, living in cadmium- and zinc-contaminated regions of the Eagle River than in fish from an uncontaminated control site. Histological analyses revealed that interrenal cell...

journal_title：General and comparative endocrinology

authors： Norris DO,Felt SB,Woodling JD,Dores RM

更新日期：1997-12-01 00:00:00

abstract：:Vertebrate eggs are surrounded by an extracellular glycoprotein coat termed zona pellucida (ZP). Integrity of ZP is critical for a correct embryo development. Two zona pellucida protein genes (zpb and zpc) from European eel were characterized, specific qPCR assays developed and their expression in immature males and f...

journal_title：General and comparative endocrinology

authors： Mazzeo I,Peñaranda DS,Gallego V,Hildahl J,Nourizadeh-Lillabadi R,Asturiano JF,Pérez L,Weltzien FA

更新日期：2012-09-01 00:00:00

abstract：:The widespread use of P-nitrophenol (PNP) as a raw material in pesticides, medicines and dyes has led to environmental pollution. PNP is a well-known endocrine disruptor in mammals and quails. This study investigated the effects of long-term PNP exposure on the testicular development and semen quality of roosters. Pub...

journal_title：General and comparative endocrinology

authors： Ren S,Li Y,Li C

更新日期：2021-01-15 00:00:00

abstract：:Seasonally-breeding amphibians have served as excellent animal models to investigate the biosynthesis and biological actions of neurosteroids. Previous studies have demonstrated that the brain of amphibians possesses key steroidogenic enzymes and produces pregnenolone, a precursor of steroid hormones, and other variou...

journal_title：General and comparative endocrinology

authors： Tsutsui K,Haraguchi S,Matsunaga M,Koyama T,Do Rego JL,Vaudry H

更新日期：2012-05-01 00:00:00

abstract：:Ovaprim (OVP) is used as an effective spawning inducer for artificial breeding of fishes and contains a salmon gonadotropin-releasing hormone analogue and a dopamine receptor-2 antagonist, domperidone. Previously, we have shown that vasotocin (VT) stimulates ovarian final oocyte maturation, hydration, and ovulation th...

journal_title：General and comparative endocrinology

authors： Chaube R,Singh RK,Joy KP

更新日期：2014-01-01 00:00:00

abstract：:To examine the reproductive endocrinology of a large pleuronectiform fish, barfin flounder, Verasper moseri, a promising candidate for aquaculture and resource enhancement in northern Japan due to its high commercial value, three gonadotropin-releasing hormones (GnRHs) in the brain was identified by isolation of their...

journal_title：General and comparative endocrinology

authors： Amano M,Takahashi A,Yamanome T,Okubo K,Aida K,Yamamori K

更新日期：2002-05-01 00:00:00

abstract：:Steroid hormone assessment using non-invasive sample collection techniques can reveal the reproductive status of aquatic mammals and the physiological mechanisms by which they respond to changes in their environment. A portion of the eastern North Pacific blue whale (Balaenoptera musculus) population that seasonally v...

journal_title：General and comparative endocrinology

authors： Valenzuela-Molina M,Atkinson S,Mashburn K,Gendron D,Brownell RL Jr

更新日期：2018-05-15 00:00:00

abstract：:Insulin-like growth factor-1 (IGF-1) is a member of the vertebrate insulin/insulin-like growth factor/relaxin gene family necessary for growth, reproduction, and survival at both the cellular and organismal level. Its sequence, protein structure, and function have been characterized in mammals, birds, and fish; howeve...

journal_title：General and comparative endocrinology

authors： Sparkman AM,Schwartz TS,Madden JA,Boyken SE,Ford NB,Serb JM,Bronikowski AM

更新日期：2012-08-01 00:00:00

abstract：:The purpose of this study was to investigate the physiological maturation-inducing steroid (MIS) in the marine protandrous yellowfin porgy (Acanthopagrus latus). Female fish were injected with 2 doses of LHRH analog (10 and 40 μg per kg). Ovarian tissue was obtained at 6 h intervals for in vitro analysis of oocyte mat...

journal_title：General and comparative endocrinology

authors： Jeng SR,Yueh WS,Lee YH,Yen HF,Chang CF

更新日期：2012-04-01 00:00:00

abstract：:A clone encoding thyroid hormone receptor-beta (TR-beta) was isolated from a sea bream (Sparus aurata) ovary cDNA library. Sea bream (sb)TR-beta is closely related to its counterparts from other vertebrates and, like them, preferentially binds T3 rather than T4. However, the putative sbTR-beta protein contains a nine-...

journal_title：General and comparative endocrinology

authors： Nowell MA,Power DM,Canario AV,Llewellyn L,Sweeney GE

更新日期：2001-07-01 00:00:00

abstract：:The effects of starvation and feeding on the release of bombyxin, a peptide of insulin superfamily in insects, from the larval brain of the silkworm Bombyx mori were investigated. Following starvation, the bombyxin titer in the hemolymph of larvae decreased, whereas its content in the brain increased. On the other han...

journal_title：General and comparative endocrinology

authors： Masumura M,Satake S,Saegusa H,Mizoguchi A

更新日期：2000-06-01 00:00:00

abstract：:Estrogen signalling is critical for ovarian differentiation in reptiles with temperature-dependent sex determination (TSD). To elucidate the involvement of estrogen in this process, adrenal-kidney-gonadal (AKG) expression of estrogen receptor (ERα) was studied at female-producing temperature (FPT) in the developing em...

journal_title：General and comparative endocrinology

authors： Inamdar LS,Khodnapur BS,Nindi RS,Dasari S,Seshagiri PB

更新日期：2015-09-01 00:00:00

abstract：:Determination of serum progesterone concentrations over a period of 2 years in female camels during various reproductive stages (estrus, pregnant, nonpregnant, and lactating) suggests that the progesterone levels exceeding 1 ng/ml are reached only if mating is fertile. A cycling camel does not have a luteal phase and ...

journal_title：General and comparative endocrinology

authors： Elias E,Bedrak E,Yagil R

更新日期：1984-02-01 00:00:00

abstract：:This article is focused on the effect of specific phase relation of serotonergic and dopaminergic oscillations on the gonadal responses of different avian species. These species include (i) summer breeding birds - Red headed bunting (exhibiting post-reproductive absolute photorefractoriness) and Indian Weaver bird (wh...

journal_title：General and comparative endocrinology

authors： Chaturvedi CM,Yadav S

更新日期：2013-09-01 00:00:00

abstract：:In lampreys, although gonadotropin (GTH) has not yet been isolated from the pituitary gland, the presence of GTH has been strongly suggested. To detect possible GTH in the sea lamprey (Petromyzon marinus) pituitary, two different cytochemical probes were tested: One was the use of antibodies to GTHs, and the other was...

journal_title：General and comparative endocrinology

authors： Nozaki M,Ominato K,Takahashi A,Kawauchi H,Sower SA

更新日期：1999-01-01 00:00:00

abstract：:The possible physiological role of a putative testicular gonadotropin-releasing hormone (GnRH)-like material was studied in the frog, Rana esculenta. We have investigated (a) changes of mitotic index (MI) of primary spermatogonia (SPG) in GnRH agonist (GnRH-Ag)-treated testes in vitro; (b) changes of androgen concentr...

journal_title：General and comparative endocrinology

authors： Di Matteo L,Minucci S,Fasano S,D'Antonio M,Pierantoni R,Chieffi G

更新日期：1990-07-01 00:00:00

abstract：:Measurement of fish steroids in water provides a non-invasive alternative to measurement in blood samples, offering the following advantages: zero or minimal intervention (i.e. no anaesthetic, bleeding or handling stress); results not being biased by sampling stress; repeat measurements on the same fish; the possibili...

journal_title：General and comparative endocrinology

authors： Scott AP,Ellis T

更新日期：2007-08-01 00:00:00

abstract：:The venoms of cone snails (genus Conus) are remarkably complex, consisting of hundreds of typically short, disulfide-rich peptides termed conotoxins. These peptides have diverse pharmacological targets, with injection of venom eliciting a range of physiological responses, including sedation, paralysis and sensory over...

journal_title：General and comparative endocrinology

authors： Robinson SD,Li Q,Bandyopadhyay PK,Gajewiak J,Yandell M,Papenfuss AT,Purcell AW,Norton RS,Safavi-Hemami H

更新日期：2017-04-01 00:00:00

abstract：:The golden rabbitfish Siganus guttatus is a reef fish with a restricted lunar-synchronized spawning rhythmicity and releases gametes simultaneously around the first quarter moon period during the spawning season. In order to understand the molecular aspects of the "circa" rhythms in this species, the full-length melat...

journal_title：General and comparative endocrinology

authors： Park YJ,Park JG,Hiyakawa N,Lee YD,Kim SJ,Takemura A

更新日期：2007-01-15 00:00:00

abstract：:It is known that in goldfish Carassius auratus, a non-sex changing fish, prostaglandin (PG) treatment can induce female-typical sex behavior in males, and androgen treatment can induce male-typical sex behavior in females. These facts suggest that goldfish have a sexually bipotential brain even after attaining sexual ...

journal_title：General and comparative endocrinology

authors： Saoshiro S,Kawaguchi Y,Hayakawa Y,Kobayashi M

更新日期：2013-01-15 00:00:00

abstract：:Chronic confinement for 1 month caused a significant elevation of plasma cortisol but suppressed the levels of plasma testosterone and 11-ketotestosterone in sexually mature male brown trout. An acute handling stress for 1 hr elevated blood cortisol and ACTH levels and also suppressed circulating androgens. This andro...

journal_title：General and comparative endocrinology

authors： Pickering AD,Pottinger TG,Carragher J,Sumpter JP

更新日期：1987-11-01 00:00:00

abstract：:Methallibure treatment (1 mg fed on alternate days to a female and a male kept in 1 liter of 25% seawater) started from 1 or 7 days postpartum (early gestation) inhibited gestation in the wild guppy, Poecilia reticulata. A few of the fish treated from 7 days postpartum (2/9) did give birth, but the young either were d...

journal_title：General and comparative endocrinology

authors： Lam TJ,Pavri C,Ng KL

更新日期：1985-11-01 00:00:00

abstract：:The distribution of the cannabinoid CB1 receptor and its relationships with individual endocrine cell types were investigated by immunohistochemistry in the anterior lobe of the Xenopus adenohypophysis. By use of a specific primary antibody raised in rabbit against the amino terminus of the rat CB1, we have found nume...

journal_title：General and comparative endocrinology

authors： Cesa R,Guastalla A,Cottone E,Mackie K,Beltramo M,Franzoni MF

更新日期：2002-01-01 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：:The rostral pars distalis (RPD), containing mainly prolactin (PRL)-secreting cells, of the pituitary from immature and mature tilapia was incubated for 16 hr at 27 degrees in hypoosmotic medium (300 mOsm/kg) in the presence (10(-8) and 10(-11) M) or absence of the human GnRH-associated peptide (GAP) molecule, a potent...

journal_title：General and comparative endocrinology

authors： Planas J,Bern HA,Millar RP

更新日期：1990-03-01 00:00:00