MALE PREGNANCY IN SEAHORSES

 Male pregnancy is one of the wonderful phenomena for mammals yet Seahorses and Pipefishes (Female Syngnathidae) are the biggest examples to prove. As the pregnancy has been evolving day by day but this is the unique evolution of male pregnancy in pipefishes and sea horses coincided with a genomic modification of one arm of the adaptive immune system. These are the only mammals where the male member of the family gets pregnant and holds up their eggs in their pouch-like kangaroos. Seahorses and pipefishes show probably the most specific types of fatherly consideration in creatures as are undeniably fit the investigation of the advancement of male parental consideration.

MATING IN SEAHORSES:

 When the mating takes place in seahorses the female seahorse puts her ovipositor into the male’s brood pouch and deposits her unfertilized eggs for fertilization into it.  The male then goes through fertilization by releasing its sperm in that pouch. Bring forth happens two to about a month after treatment in an unfathomable presentation like the one that appeared previously. Somewhere in the range of 50 to more than 1,000 infant seahorses, will bring forth at one time, and the dad’s withdrawals can last as long as 12 hours. When conceived, the infant goes through half a month floating with microscopic fish in the sea, making them truly powerless to predation. Just around one out of 1,000 will get by to adulthood.

MATING IN PIPEFISHES:

 In pipefishes, it differs slightly as there is little change in the position of their brood pouch. Here it is located on their belly close to their heads. Then their fertilization takes place and they carry the eggs until hatching takes place. Male pipefish can carry 5 to 40 offsprings in their pouch.

PARENTAL CARE:

  Although male pregnancy indeed relieves a female from the burden of caring for her offspring she still manages to provide the effective nutrients that are packaged in eggs. Thus, female pipefish invest more in offspring than deadbeat fathers in female pregnant species. However, these pipefish leave their mating partners after mating as the process of their behavioural pattern. In monogamous seahorses, by contrast, a female remains ‘married’ to her mate and check on him often. By so doing she is getting prepared herself with a new batch of eggs as soon as her husband male seahorse gives birth.

 During pregnancy, a male is briefly out of circulation within the sexual activity. When most males in a population are pregnant, a female comes in a tough situation to find a safe place for eggs. In some of the species of pipefishes, this results in high competition among females for the few available empty males. Due to these characteristics, there has been an evolution of the secondary like body stripes, in females which can make things for them less obvious.  This is one of the special traits for evolution wherein males are often under strong sexual selection for body adornments, like a peacock’s showy tail.

Male pregnancy and sex-job inversion are something other than logical interests: they give important proving ground to speculations about mating frameworks and sexual determination. Male pregnancy may even work with the making of new species. Seahorses are monogamous, so the most ideal alternative for every individual is to discover a mate of comparable size to itself. Otherwise, their pouch would either be too small to hold all of the female eggs or too big for her to fill. This situation favours size assortative mating, which recent research suggests can contribute to reproductive isolation between groups of individuals differing in size, thereby predisposing seahorses to form new species quickly.

Pipefishes and seahorses are the solitary species to which the term male pregnancy has been applied. Although paternal care is fairly common in the animal world, few if any species have taken it to the outrageous extremes seen in Syngnathidae. Males may carry fertilized eggs on their bodies, as in giant water bugs and midwife toads, or they may defend nests or carry offspring in their mouths, as in many fishes. In a couple of bird animal types, the male member bears the sole obligation regarding hatching eggs.

Understanding the changes associated with the parallel evolution of male pregnancy in the two major Syngnathidae lineages will help to identify key innovations that facilitated the development of this unique type of propagation and, a thorough examination with different types of live-bearing may permit the distinguishing proof of a typical arrangement of attributes shared by every single viviparous living being.

REFERENCES:

https://www.pnas.org/content/117/17/9431#:~:text=Here%2C%20we%20study%20the%20seahorse,external%20oviparity%20to%20internal%20gestation.&text=Our%20findings%20suggest%20that%20a,evolution%20of%20unique%20male%20pregnancy.

https://www.businessinsider.in/these-are-the-only-3-animals-on-earth-who-produce-offspring-this-way/articleshow/53565377.cms

4 Comments

  1. Supriya

    Well represented

  2. Nakul

    Good info,looking forward to more of these kind of info

  3. Arjun singh

    Thank you for the knowledge shared, it’s very informative.

  4. Nandan Kumar

    It was really very informative , all the important things were displayed in a very easy manner which is very helpful

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