Parasema damsel fish and algae symbiotic relationship

The Symbiotic Relationship of Algae and Spotted Salamanders | Finger Lakes Land Trust

parasema damsel fish and algae symbiotic relationship

Neon damselfish from East Timor Habitat Many species live in tropical. Chrysiptera parasema, also known as yellowtail damselfish, yellowtail blue damsel, goldtail .. [8] Causes Coral and microscopic algae have a symbiotic relationship. algal ecology, sea turtle ecology, and coral disease. Amy Wilde is the . Are damselfish detrimental to Bonaire's coral reefs? tight knit symbiotic relationship between coral The other species, Chrysiptera parasema. Dascyllus reticulatus (Reticulate damselfish or Two-stripe damselfish) Many territorial grazing damselfish are referred to as “farmers” because they cultivate algal . symbiotic association with three species of anemones: Heteractis .. relationship with the anemone Maracanthia cookei; it appears to.

These territories provide them with hiding spots, dietary needs, and spawning sites.

parasema damsel fish and algae symbiotic relationship

Individuals in suboptimal territories frequently attempt to relocate, and so those in optimal habitats must constantly monitor territorial occupancy. Territorial aggression is often proportional to territory quality.

Damselfish 'garden' algae

Movements outside of territorial borders, called forays, are common and may span distances of sixteen meters or more. Three types of forays exist. The shortest-distance ones are involved in foraging.

Longer forays usually involve courtship activity and mating. Non-feeding and non-reproductive forays are associated with territorial reoccupation. Courtship In the species S.

Damselfish | Revolvy

Even though large male size can be advantageous in defending nests and eggs against conspecifics among many animals, nest intrusions are not observed in this damselfish species. Females also do not choose their mates based upon the brood sizes of the males.

In spite of the increased male parental care, brood size does not affect egg survival, as eggs are typically taken during the night when the males are not defending their nests. Rather, female choice of mates is dependent on male courtship rate.

Males signal their parental quality by the vigor of their courtship displays, and females mate preferentially with vigorously courting males. The signal jump involves large amounts of rapid swimming, and females choose mates based on the vigor with which males do so.

Females determine the male courtship rates using sounds that are produced during signal jumps.

parasema damsel fish and algae symbiotic relationship

As the male damselfish swims down the water column, it creates a pulsed sound. Male courtship varies in the number and rates of those pulses.

Female size is significantly correlated with ovary weight, and males intensify their courtship rituals for the more fecund females. Research has shown that males that mate with larger females do indeed receive and hatch greater numbers of eggs.

Among this species, evolutionary selection favors those males that begin mating as soon as possible during spawning seasons even if the most favorable egg clutches are spawned at later times.

Shelter sites are essential for the bicolor damselfish in avoiding predation, and females may evaluate the suitability of these sites at a male territory before depositing their eggs.

Odd Couple - Fish and Shrimp's symbiotic relationship

The distance to the territory of a mate influences the number of visits that a female undergoes with a male. At short distances, females make many repeated visits. At longer ones, they may spawn their entire clutch in one visit. This plasticity in mating behavior can be attributed to two factors: Thus, a spawning female should return to its home as often as possible. However, a greater number of spawning visits increases the chance of being attacked, especially when mating with males that are far away.

To minimize overall costs, females change their number of spawning visits depending on male territory distance. Studies have shown it typically consumes over twenty-five percent of its clutches. The males generally consume clutches that are smaller than average in size, as well as those that are still in the early stages of development.

Female cortez damselfish tend to deposit their eggs with males who are already caring for early-stage eggs, rather than males with late-stage eggs.

Damselfish 'garden' algae | EurekAlert! Science News

This preference is seen particularly in females that deposit smaller-sized clutches, which are more vulnerable to being consumed. Furthermore, the algae are very difficult to see using traditional light microscopes; only the use of fluorescent and electron microscopes enabled Kerney to detect algae in the salamander cells. This remarkable discovery has opened much scientific inquiry into related issues — including the fundamental question of how the algae get inside the cells.

Kerney and colleagues have discovered O. The exact mechanism is unclear, but seems to be related to elevated levels in the host cell of a lipoprotein that triggers endocytosis — the formation of a concavity on the cell membrane that takes in the foreign body and eventually surrounds it.

So if endocytosis is indeed happening, then there must be some yet-unknown way by which the algae escape the sac that swallows them up. Then there is the question of what happens inside the salamander cells. Kerney and colleagues have observed that salamander mitochondria organelles that carry out cell respiration congregate around the algae, affirming that the embryonic cells probably respire using oxygen and carbohydrates produced by the algae.

  • The Symbiotic Relationship of Algae and Spotted Salamanders

Furthermore, the most recent research, published in May by John Burns and colleagues, illuminates why the embryos tolerate the algae — one specific immune response pathway involving a protein family called NF-kappa-b seems to be suppressed.

But while evidence suggests a benefit for the salamander, it seems that the algae might end up worse off once subsumed by the animal cell. Burns describes how algae inside salamander cells show stress responses and inhibited photosynthesis, perhaps because of low light.


The algae also suddenly start to engage in fermentation, indicating a possible deficit of sulfur or oxygen. So this intracellular relationship now appears less like sunny mutualistic bliss than a cohabitation gone sour. But it is still a revolutionary discovery for science, and a revelation of new wonders for us amateur nature-lovers. Who would ever have thought that these quivering capsules, sitting unseen in pools not much more than a puddle, would host such drama — a struggle for sustenance, a breaching of boundaries, an ambiguous alliance, and indeed, a redefinition of life as we thought we knew it?