The effect of background colour and lighting of the aquarium on the body pigmentation of the peppered shrimp Lysmata wurdemanni

2018 ◽  
Vol 49 (11) ◽  
pp. 3508-3516 ◽  
Author(s):  
Lorenzo Díaz-Jiménez ◽  
Martha Patricia Hernández-Vergara ◽  
Carlos Iván Pérez-Rostro
Keyword(s):  
The Body ◽  
Body Pigmentation ◽  
Lysmata Wurdemanni

scholarly journals A macroscopic classification of the embryonic development of the one-sided livebearer Jenynsia multidentata (Teleostei: Anablepidae)

2017 ◽  
Vol 15 (4) ◽  
Author(s):  
Nathalia C. López-Rodríguez ◽  
Cíntia M. de Barros ◽  
Ana Cristina Petry
Keyword(s):  
Embryonic Development ◽  
Dry Weight ◽  
The Body ◽  
Stage 4 ◽  
Macroscopic Classification ◽  
Body Pigmentation ◽  
The One ◽  
Stage 1 ◽  
Jenynsia Multidentata

ABSTRACT This study proposes eight stages according to the main discernible changes recorded throughout the embryonic development of Jenynsia multidentata. The development of morphological embryo structures, pigmentation, and changes in tissues connecting mother and embryo were included in the stage characterization. From the fertilized egg (Stage 1), an embryo reaches the intermediary stages when presenting yolk syncytial layer (Stage 2), initial pigmentation of the outer layers of the retina and dorsal region of the head (Stage 3), and the sprouting of the caudal (Stage 4), dorsal and anal fins (Stage 5). During the later stages, the ovarian folds enter the gills, and the body pigmentation becomes more intense (Stage 6), the body becomes elongated (Stage 7), and there is a greater intensity in body pigmentation and increased muscle mass (Stage 8). The dry weight of the batches varied between 0.6 ± 0.3 mg (Stage 3) to 54.6 ± 19.7 mg (Stage 8), but the dry weight of the maternal-embryonic connecting tissues remained almost constant. After controlling the effect of those reproductive tissues, the gain in dry weight of the batches throughout development increased exponentially from Stage 6, reflecting the increase in size and weight of the embryos due to matrotrophy.

Dietary astaxanthin improved the body pigmentation and antioxidant function, but not the growth of discus fish (Symphysodon spp.)

2016 ◽  
Vol 48 (4) ◽  
pp. 1359-1367 ◽  
Author(s):  
Xuelu Song ◽  
Lei Wang ◽  
Xiaoqin Li ◽  
Zaizhong Chen ◽  
Gaoyang Liang ◽  
...  
Keyword(s):  
The Body ◽  
Antioxidant Function ◽  
Body Pigmentation

scholarly journals Occurrence of tayras (Eira barbara Linnaeus, 1758) with anomalous coloration in Cerrado remnants in the state of São Paulo, Brazil

2019 ◽  
Vol 19 (3) ◽  
Author(s):  
Vitória M. Scrich ◽  
Marcella C. Pônzio ◽  
Nielson Pasqualotto ◽  
Thiago F. Rodrigues ◽  
Roberta M. Paolino ◽  
...  
Keyword(s):  
Camera Trap ◽  
Sao Paulo ◽  
Agricultural Landscapes ◽  
The State ◽  
The Body ◽  
The Other ◽  
São Paulo ◽  
Neotropical Mammals ◽  
Body Pigmentation ◽  
Eira Barbara

Abstract: Coloration anomalies are mainly genetically-based disorders in which body pigmentation is either reduced (hypopigmentation) or produced in excess (melanism), in parts or the totality of the body. Cases of hypopigmentation have been documented in many neotropical mammals, including the tayra (Eira barbara Linnaeus, 1758). We expand the account of anomalous coloration occurrence presenting new registers of hypopigmented tayras in Brazil. Data was collected during a mammal survey carried out in three agricultural landscapes within the Cerrado domain in the northeast of the state of São Paulo. We obtained two kinds of records of hypopigmented tayras, one from direct sighting and the other from a camera-trap. We discuss the likely implications of this conspicuous coloration to tayras and highlight some possibilities of study.

First record of colour abnormalities in the bocon toadfish Amphichthys cryptocentrus (Valenciennes 1837) (Teleostei: Batrachoididae)

2015 ◽  
Vol 8 ◽  
Author(s):  
Cláudio L.S. Sampaio ◽  
José De Anchieta C.C. Nunes ◽  
Raphael M. Macieira ◽  
José Amorim Reis-Filho
Keyword(s):  
Feeding Habits ◽  
First Record ◽  
The Body ◽  
Morphometric Data ◽  
The South ◽  
Western Atlantic ◽  
Dark Background ◽  
Body Pigmentation ◽  
Associated Species

The batrachoididAmphichthys cryptocentrusis an estuarine reef-associated species, characterized by a body of a uniformly dark background colour and head greatly depressed. We report colour abnormalities for this species, based on two specimens collected in the south-western Atlantic. Additionally, morphometric data and information about the species’ feeding habits and reproduction are provided. One specimen (most of the body was non-pigmented) exhibited small dark spots over a uniformly white body, but eyes were normally pigmented. Another specimen (totally non-pigmented) was oculocutaneous albino, lacked body pigmentation and eyes were pink-reddish translucent. Potential effects of these colour abnormalities on their ecology and behaviours are discussed.

The effect of two carotenoid sources, background colour and light spectrum on the body pigmentation of the clownfish Amphiprion ocellaris

2021 ◽  
Author(s):  
Lorenzo Díaz‐Jiménez ◽  
Martha Patricia Hernández‐Vergara ◽  
Carlos Iván Pérez‐Rostro ◽  
Miguel Ángel Olvera‐Novoa
Keyword(s):  
The Body ◽  
Light Spectrum ◽  
Body Pigmentation

Representing utility and deploying the body

2020 ◽  
Vol 43 ◽  
Author(s):  
David Spurrett
Keyword(s):  
Functional Activity ◽  
Degrees Of Freedom ◽  
The Body ◽  
Target Article ◽  
Processing Demands ◽  
The Many

Abstract Comprehensive accounts of resource-rational attempts to maximise utility shouldn't ignore the demands of constructing utility representations. This can be onerous when, as in humans, there are many rewarding modalities. Another thing best not ignored is the processing demands of making functional activity out of the many degrees of freedom of a body. The target article is almost silent on both.

Neuron-glia relationship during the early postembryonic development of the nervous system in some oligochaetes

1978 ◽  
Vol 36 (2) ◽  
pp. 600-601
Author(s):  
Wiktor Djaczenko ◽  
Carmen Calenda Cimmino
Keyword(s):  
Nervous System ◽  
Glial Cells ◽  
Early Period ◽  
Postembryonic Development ◽  
Ruthenium Red ◽  
The Body ◽  
Tubifex Tubifex ◽  
Growth Stages ◽  
Cell Processes ◽  
Cytoplasmic Processes

The simplicity of the developing nervous system of oligochaetes makes of it an excellent model for the study of the relationships between glia and neurons. In the present communication we describe the relationships between glia and neurons in the early periods of post-embryonic development in some species of oligochaetes.Tubifex tubifex (Mull. ) and Octolasium complanatum (Dugès) specimens starting from 0. 3 mm of body length were collected from laboratory cultures divided into three groups each group fixed separately by one of the following methods: (a) 4% glutaraldehyde and 1% acrolein fixation followed by osmium tetroxide, (b) TAPO technique, (c) ruthenium red method.Our observations concern the early period of the postembryonic development of the nervous system in oligochaetes. During this period neurons occupy fixed positions in the body the only observable change being the increase in volume of their perikaryons. Perikaryons of glial cells were located at some distance from neurons. Long cytoplasmic processes of glial cells tended to approach the neurons. The superimposed contours of glial cell processes designed from electron micrographs, taken at the same magnification, typical for five successive growth stages of the nervous system of Octolasium complanatum are shown in Fig. 1. Neuron is designed symbolically to facilitate the understanding of the kinetics of the growth process.

Flagellar Attachment in Selected Trypanosomes

1973 ◽  
Vol 31 ◽  
pp. 496-497
Author(s):  
J. J. Paulin
Keyword(s):  
Cell Membrane ◽  
Lateral Surface ◽  
The Body ◽  
Flagellar Pocket ◽  
Integral Component ◽  
Free Flagellum ◽  
Flagellar Axoneme

Movement in epimastigote and trypomastigote stages of trypanosomes is accomplished by planar sinusoidal beating of the anteriorly directed flagellum and associated undulating membrane. The flagellum emerges from a bottle-shaped depression, the flagellar pocket, opening on the lateral surface of the cell. The limiting cell membrane envelopes not only the body of the trypanosome but is continuous with and insheathes the flagellar axoneme forming the undulating membrane. In some species a paraxial rod parallels the axoneme from its point of emergence at the flagellar pocket and is an integral component of the undulating membrane. A portion of the flagellum may extend beyond the anterior apex of the cell as a free flagellum; the length is variable in different species of trypanosomes.

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